gdb/testsuite: use a more unique name in gdb.mi/mi-breakpoint-multiple-locations.exp

I see failures in this test, due to the function name "add" being too
generic, and unexpected breakpoint locations being found in my
libstdc++, such as (wrapped for readability):

    {
  	number="2.4",enabled="y",addr="0x00007ffff7d67e68",
  	func="(anonymous namespace)::fast_float::bigint::add",
	file="/usr/src/debug/gcc/libstdc++-v3/src/c++17/fast_float/fast_float.h",
	fullname="/usr/src/debug/gcc/libstdc++-v3/src/c++17/fast_float/fast_float.h",
	line="1815", thread-groups=["i1"]
    }

Change the test to use a more unique name.

Change-Id: I91de781be62d246eb41c73eaa410ebdd12633d1d
diff --git a/gdb/testsuite/gdb.mi/mi-breakpoint-multiple-locations.cc b/gdb/testsuite/gdb.mi/mi-breakpoint-multiple-locations.cc
index ab820ff..969e3cb 100644
--- a/gdb/testsuite/gdb.mi/mi-breakpoint-multiple-locations.cc
+++ b/gdb/testsuite/gdb.mi/mi-breakpoint-multiple-locations.cc
@@ -16,13 +16,13 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 static int
-add (int a, int b)
+a_very_unique_name (int a, int b)
 {
   return a + b;
 }
 
 static double
-add (double a, double b)
+a_very_unique_name (double a, double b)
 {
   return a + b;
 }
@@ -30,7 +30,7 @@
 int
 main (void)
 {
-  int i = add (3, 4);
-  double d = add (3.0, 4.0);
+  int i = a_very_unique_name (3, 4);
+  double d = a_very_unique_name (3.0, 4.0);
   return 1;
 }
diff --git a/gdb/testsuite/gdb.mi/mi-breakpoint-multiple-locations.exp b/gdb/testsuite/gdb.mi/mi-breakpoint-multiple-locations.exp
index 8600b1b..5164747 100644
--- a/gdb/testsuite/gdb.mi/mi-breakpoint-multiple-locations.exp
+++ b/gdb/testsuite/gdb.mi/mi-breakpoint-multiple-locations.exp
@@ -67,12 +67,12 @@
 
 	    # Check the breakpoint-created event.
 	    set pattern [make_breakpoints_pattern $expect_fixed_output 2 y y]
-	    mi_gdb_test "break add" \
-		[multi_line "&\"break add\\\\n\"" \
+	    mi_gdb_test "break a_very_unique_name" \
+		[multi_line "&\"break a_very_unique_name\\\\n\"" \
 			    "~\"Breakpoint ${decimal} at.*\\(2 locations\\)\\\\n\"" \
 			    "=breakpoint-created,${pattern}" \
 			    "\\^done" ] \
-		"break add"
+		"break a_very_unique_name"
 
 	    # Check the -break-info output.
 	    mi_gdb_test "-break-info" \
@@ -81,7 +81,7 @@
 
 	    # Check the -break-insert response.
 	    set pattern [make_breakpoints_pattern $expect_fixed_output 3 y y]
-	    mi_gdb_test "-break-insert add" "\\^done,${pattern}" "insert breakpoint with MI command"
+	    mi_gdb_test "-break-insert a_very_unique_name" "\\^done,${pattern}" "insert breakpoint with MI command"
 
 	    # Modify enableness through MI commands shouldn't trigger MI
 	    # notification.