gdb/testsuite: give a test a real name

A test in gdb.python/py-send-packet.exp added in this commit:

  commit 24b2de7
  Date:   Tue Aug 31 14:04:36 2021 +0100

      gdb/python: add gdb.RemoteTargetConnection.send_packet

included a large amount of binary data in the command sent to GDB.  As
this test didn't have a real test name the binary data was included in
the gdb.sum file.  The contents of the binary data could change
between different runs of GDB, and this makes comparing results
harder.

This commit gives the test a real test name.

gdb/testsuite/gdb.python/py-send-packet.exp

@@ -88,7 +88,8 @@ if { ! $skip_auxv_test } {
     # Run the test, fetches the auxv data in Python and confirm it
     # matches the expected results.
     gdb_test "python run_auxv_send_packet_test(\"$reply_data\")" \
-	"auxv send packet test passed"
+	"auxv send packet test passed" \
+	"call python run_auxv_send_packet_test function"
 }
 
 set sizeof_global_var [get_valueof "/d" "sizeof(global_var)" "UNKNOWN"]