Fix regression on s390x with entry-values.exp.

The trace-specific test case 'entry-values' concludes fairly late in
the process that this platform doesn't support trace.  Before that,
there are some platform specifics that don't work on s390x.  The fix
addresses two aspects:

(1) Removal of an excess space character in the regex for the
    disassembly.  This is needed when there is a function alignment
    gap, because then the hex address is immediately followed by a
    colon, like in the first 'nopr' line below:

    (gdb) disassemble foo+50,+10
    Dump of assembler code from 0x32 to 0x3c:
       0x0000000000000032 <foo+50>: br      %r4
       0x0000000000000034:  nopr    %r7
       0x0000000000000036:  nopr    %r7
       0x0000000000000038 <bar+0>:  stmg    %r11,%r15,88(%r15)
    End of assembler dump.

(2) Handling for the s390-specific call instruction.

gdb/testsuite/ChangeLog:
	* gdb.trace/entry-values.exp: Remove excess space character from
	regex patterns.  Handle s390 call instruction.

1 files changed, 4 insertions, 2 deletions

diff --git a/gdb/testsuite/gdb.trace/entry-values.exp b/gdb/testsuite/gdb.trace/entry-values.exp
index 0fb35a0..f10ffa6 100644
--- a/gdb/testsuite/gdb.trace/entry-values.exp
+++ b/gdb/testsuite/gdb.trace/entry-values.exp
@@ -57,7 +57,7 @@ gdb_test_multiple $test $test {
 
 set test "disassemble foo+$foo_length,+10"
 gdb_test_multiple $test $test {
-    -re ".*($hex) <foo\\+$foo_length>:\[^\r\n\]+\r\n\[ \]+($hex) .*\.\r\n$gdb_prompt $" {
+    -re ".*($hex) <foo\\+$foo_length>:\[^\r\n\]+\r\n\[ \]+($hex).*\.\r\n$gdb_prompt $" {
 	set start $expect_out(1,string)
 	set end $expect_out(2,string)
 
@@ -77,6 +77,8 @@ set bar_call_foo ""
 
 if { [istarget "arm*-*-*"] || [istarget "aarch64*-*-*"] } {
     set call_insn "bl"
+} elseif { [istarget "s390*-*-*"] } {
+    set call_insn "brasl"
 } else {
     set call_insn "call"
 }
@@ -109,7 +111,7 @@ if { [string equal $bar_call_foo ""] || [string equal $bar_length ""] } {
 
 set test "disassemble bar+$bar_length,+10"
 gdb_test_multiple $test $test {
-    -re ".*($hex) <bar\\+$bar_length>:\[^\r\n\]+\r\n\[ \]+($hex) .*\.\r\n$gdb_prompt $" {
+    -re ".*($hex) <bar\\+$bar_length>:\[^\r\n\]+\r\n\[ \]+($hex).*\.\r\n$gdb_prompt $" {
 	set start $expect_out(1,string)
 	set end $expect_out(2,string)