sim/common: Fix warnings: "warning: implicit declaration of function..."

During building of several cgen simulator's I notices the below
warnings.  Adding includes fixes these.

Including config.h allows stdio.h to properly configure itself to expose
asprintf().

The other warnings for abort, free, memset, strlen are trivial.

Warnings:

../../../binutils-gdb/sim/or1k/../common/sim-watch.c: In function ‘sim_watchpoint_install’:
../../../binutils-gdb/sim/or1k/../common/sim-watch.c:415:10: warning: implicit declaration of function ‘asprintf’; did you mean ‘vasprintf’? [-Wimplicit-function-declaration]
      if (asprintf (&name, "watch-%s-%s",
          ^~~~~~~~
          vasprintf

../../../binutils-gdb/sim/lm32/../common/hw-device.c: In function ‘hw_strdup’:
../../../binutils-gdb/sim/lm32/../common/hw-device.c:59:34: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration]
       char *dup = hw_zalloc (me, strlen (str) + 1);
                                  ^~~~~~

../../../binutils-gdb/sim/lm32/../common/hw-events.c: In function ‘hw_event_queue_schedule’:
../../../binutils-gdb/sim/lm32/../common/hw-events.c:92:3: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration]
   memset (&dummy, 0, sizeof dummy);
   ^~~~~~

../../../binutils-gdb/sim/lm32/../common/hw-handles.c: In function ‘hw_handle_remove_ihandle’:
../../../binutils-gdb/sim/lm32/../common/hw-handles.c:211:4: warning: implicit declaration of function ‘free’ [-Wimplicit-function-declaration]
    free (delete);
    ^~~~

../../../binutils-gdb/sim/lm32/../common/sim-fpu.c: In function ‘pack_fpu’:
../../../binutils-gdb/sim/lm32/../common/sim-fpu.c:292:7: warning: implicit declaration of function ‘abort’ [-Wimplicit-function-declaration]
       abort ();
       ^~~~~

sim/common/ChangeLog:

	* sim-options.c: Include "config.h".
	Include <stdio.h>.
	* sim-watch.c: Include "config.h".
	Include <stdio.h>.
	* hw-device.c: Include <string.h>.
	* hw-events.c: Include <string.h>.
	* hw-handles.c: Include <stdlib.h>.
	* sim-fpu.c: Include <stdlib.h>.

7 files changed, 28 insertions, 0 deletions

diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index 653a2fb..53dde49 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,5 +1,16 @@
 2019-03-28  Stafford Horne  <shorne@gmail.com>
 
+	* sim-options.c: Include "config.h".
+	Include <stdio.h>.
+	* sim-watch.c: Include "config.h".
+	Include <stdio.h>.
+	* hw-device.c: Include <string.h>.
+	* hw-events.c: Include <string.h>.
+	* hw-handles.c: Include <stdlib.h>.
+	* sim-fpu.c: Include <stdlib.h>.
+
+2019-03-28  Stafford Horne  <shorne@gmail.com>
+
 	* Make-common.in (sim-arange_h): Remove sim-arange.c
 	* sim-arange.c: Remove SIM_ARANGE_C.
 	Add ifdef for _SIM_ARANGE_C_.
diff --git a/sim/common/hw-device.c b/sim/common/hw-device.c
index ee1bfad..458ee22 100644
--- a/sim/common/hw-device.c
+++ b/sim/common/hw-device.c
@@ -27,6 +27,10 @@
 #include <stdlib.h>
 #endif
 
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+
 /* Address methods */
 
 const hw_unit *
diff --git a/sim/common/hw-events.c b/sim/common/hw-events.c
index e652336..f78be2a 100644
--- a/sim/common/hw-events.c
+++ b/sim/common/hw-events.c
@@ -23,6 +23,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "sim-events.h"
 
+#if HAVE_STRING_H
+#include <string.h>
+#endif
 
 /* The hw-events object is implemented using sim-events */
 
diff --git a/sim/common/hw-handles.c b/sim/common/hw-handles.c
index 2848b9b..d056562 100644
--- a/sim/common/hw-handles.c
+++ b/sim/common/hw-handles.c
@@ -23,6 +23,9 @@
 #include "hw-main.h"
 #include "hw-base.h"
 
+#if HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
 
 struct hw_handle_mapping
 {
diff --git a/sim/common/sim-fpu.c b/sim/common/sim-fpu.c
index 81cdbf5..74f5fd4 100644
--- a/sim/common/sim-fpu.c
+++ b/sim/common/sim-fpu.c
@@ -41,6 +41,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "sim-io.h"
 #include "sim-assert.h"
 
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
 
 /* Debugging support.
    If digits is -1, then print all digits.  */
diff --git a/sim/common/sim-options.c b/sim/common/sim-options.c
index 69aebfe..dc4a712 100644
--- a/sim/common/sim-options.c
+++ b/sim/common/sim-options.c
@@ -17,6 +17,7 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#include "config.h"
 #include "sim-main.h"
 #ifdef HAVE_STRING_H
 #include <string.h>
@@ -29,6 +30,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <stdlib.h>
 #endif
 #include <ctype.h>
+#include <stdio.h>
 #include "libiberty.h"
 #include "sim-options.h"
 #include "sim-io.h"
diff --git a/sim/common/sim-watch.c b/sim/common/sim-watch.c
index 6c357f8..174336b 100644
--- a/sim/common/sim-watch.c
+++ b/sim/common/sim-watch.c
@@ -17,12 +17,14 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#include "config.h"
 #include "sim-main.h"
 #include "sim-options.h"
 
 #include "sim-assert.h"
 
 #include <ctype.h>
+#include <stdio.h>
 
 #ifdef HAVE_STRING_H
 #include <string.h>