[gdb/testsuite] Fix mi-sym-info.exp matching FAILs

When running gdb.mi/mi-sym-info.exp on openSUSE Leap 15.1, I get:
...
FAIL: gdb.mi/mi-sym-info.exp: List all functions matching type void \
  (unexpected output)
FAIL: gdb.mi/mi-sym-info.exp: -symbol-info-variables --max-results 3 \
  (unexpected output)
FAIL: gdb.mi/mi-sym-info.exp: -symbol-info-types --max-results 4 \
  (unexpected output)
...

The executable contains debug info from files other than the source files:
...
$ readelf -wi mi-sym-info | grep "DW_AT_name.*\.[cS]$" | awk '{print $8}'
../sysdeps/x86_64/start.S
init.c
../sysdeps/x86_64/crti.S
src/gdb/testsuite/gdb.mi/mi-sym-info-1.c
src/gdb/testsuite/gdb.mi/mi-sym-info-2.c
elf-init.c
../sysdeps/x86_64/crtn.S
...

The test does not expect this extra info, resulting in matching failures.

Fix this by restricting the failing commands using --name.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-03-13  Tom de Vries  <tdevries@suse.de>

	* gdb.mi/mi-sym-info-2.c (another_char_t, another_short_t): New typedef.
	(var1, var2): New variable.
	* gdb.mi/mi-sym-info.exp: Add --name to various commands to restrict
	matching symbols.

1 files changed, 8 insertions, 5 deletions

diff --git a/gdb/testsuite/gdb.mi/mi-sym-info.exp b/gdb/testsuite/gdb.mi/mi-sym-info.exp
index c07f3e8..7f8cf22 100644
--- a/gdb/testsuite/gdb.mi/mi-sym-info.exp
+++ b/gdb/testsuite/gdb.mi/mi-sym-info.exp
@@ -107,7 +107,7 @@ mi_gdb_test "116-symbol-info-functions --name f3" \
     "List all functions matching pattern f3"
 
 set lineno [gdb_get_line_number "f4 (int *arg)" ${srcfile}]
-mi_gdb_test "117-symbol-info-functions --type void" \
+mi_gdb_test "117-symbol-info-functions --type void --name ^\[^_\]" \
     "117\\^done,symbols=\{debug=\\\[\{filename=\"\[^\"\]+$srcfile\",fullname=\"\[^\"\]+$srcfile\",symbols=\\\[\{line=\"36\",name=\"f4\",type=\"void \\(int \\*\\)\",description=\"void f4\\(int \\*\\);\"\}\\\]\}\\\]\}" \
     "List all functions matching type void"
 
@@ -143,10 +143,13 @@ mi_gdb_test "123-symbol-info-functions --max-results 2" \
     "123\\^done,symbols=\{debug=\\\[\{filename=\"\[^\"\]+$srcfile2\",fullname=\"\[^\"\]+$srcfile2\",symbols=\\\[\{line=\"33\",name=\"f2\",type=\"float \\(another_float_t\\)\",description=\"float f2\\(another_float_t\\);\"\},\{line=\"39\",name=\"f3\",type=\"int \\(another_int_t\\)\",description=\"int f3\\(another_int_t\\);\"\}\\\]\}\\\]\}" \
     "-symbol-info-functions --max-results 2"
 
-mi_gdb_test "124-symbol-info-variables --max-results 3" \
+mi_gdb_test "124-symbol-info-variables --max-results 3 --name ^\[^_\]" \
     "124\\^done,symbols=\{debug=\\\[\{filename=\"\[^\"\]+$srcfile2\",fullname=\"\[^\"\]+$srcfile2\",symbols=\\\[\{line=\"21\",name=\"global_f2\",type=\"int\",description=\"int global_f2;\"\},\{line=\"20\",name=\"global_i2\",type=\"int\",description=\"int global_i2;\"\},\{line=\"19\",name=\"global_f1\",type=\"float\",description=\"static float global_f1;\"\}\\\]\}\\\]\}" \
-    "-symbol-info-variables --max-results 3"
 
-mi_gdb_test "125-symbol-info-types --max-results 4" \
-    "125\\^done,symbols=\{debug=\\\[\{filename=\"\[^\"\]+$srcfile2\",fullname=\"\[^\"\]+$srcfile2\",symbols=\\\[\{line=\"24\",name=\"another_float_t\"\},\{line=\"23\",name=\"another_int_t\"\},\{name=\"float\"\},\{name=\"int\"\}\\\]\}\\\]\}" \
+set s1 "\{line=\"44\",name=\"another_char_t\"\}"
+set s2 "\{line=\"24\",name=\"another_float_t\"\}"
+set s3 "\{line=\"23\",name=\"another_int_t\"\}"
+set s4 "\{line=\"45\",name=\"another_short_t\"\}"
+mi_gdb_test "125-symbol-info-types --max-results 4 --name another_" \
+    "125\\^done,symbols=\{debug=\\\[\{filename=\"\[^\"\]+$srcfile2\",fullname=\"\[^\"\]+$srcfile2\",symbols=\\\[$s1,$s2,$s3,$s4\\\]\}\\\]\}" \
     "-symbol-info-types --max-results 4"