gdb/testsuite: Remove duplicates from gdb.base/pending.exp

When running the testsuite, I have:

    Running .../gdb/testsuite/gdb.base/pending.exp ...
    DUPLICATE: gdb.base/pending.exp: disable other breakpoints

Fix by adjusting the test names.

Tested on x86_64-linux.

gdb/testsuite/gdb.base/pending.exp

diff --git a/gdb/testsuite/gdb.base/pending.exp b/gdb/testsuite/gdb.base/pending.exp
index 3330077..c9178fc 100644
--- a/gdb/testsuite/gdb.base/pending.exp
+++ b/gdb/testsuite/gdb.base/pending.exp
@@ -244,8 +244,8 @@
 # be 3 then.
 #
 
-gdb_test "disable 7" "" "disable other breakpoints"
-gdb_test "disable 5" "" "disable other breakpoints"
+gdb_test "disable 7" "" "disable breakpoint 7"
+gdb_test "disable 5" "" "disable breakpoint 5"
 
 gdb_test "continue" \
 	 ".*Breakpoint.*pendfunc1.*\\\(x=3\\\) at.*pendshr.c:$bp3_loc.*printf.*;" \