[gcc r13-6428] testsuite: Fix up memchr-3.c test [PR108991]

[Jakub Jelinek <jakub@gcc.gnu.org>]

https://gcc.gnu.org/g:73bbfd5970ba3b7a5bcb3f7043d93fec89ccb991

commit r13-6428-g73bbfd5970ba3b7a5bcb3f7043d93fec89ccb991
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Mar 3 00:50:10 2023 +0100

    testsuite: Fix up memchr-3.c test [PR108991]
    
    The newly added dg-warning directive was missing the comment argument,
    so the target selector was treated as comment and the warning was expected
    on all targets when it should be expected only on llp64 targets.
    
    2023-03-03  Jakub Jelinek  <jakub@redhat.com>
    
            PR testsuite/108991
            * gcc.dg/memchr-3.c: Add missing comment argument to dg-warning
            before target selector.

Diff:
---
 gcc/testsuite/gcc.dg/memchr-3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/memchr-3.c b/gcc/testsuite/gcc.dg/memchr-3.c
index af1b26ef3ae..9c73265a89e 100644
--- a/gcc/testsuite/gcc.dg/memchr-3.c
+++ b/gcc/testsuite/gcc.dg/memchr-3.c
@@ -6,7 +6,7 @@
 typedef __INT8_TYPE__  int8_t;
 typedef __INT32_TYPE__ int32_t;
 
-extern void* memchr (const void*, int, long); /* { dg-warning "-Wbuiltin-declaration-mismatch" { target llp64 } } */
+extern void* memchr (const void*, int, long); /* { dg-warning "-Wbuiltin-declaration-mismatch" "" { target llp64 } } */
 
 struct SX
 {