[gcc r13-2505] runtime: ignore __morestack function in runtime.Callers

[Ian Lance Taylor <ian@gcc.gnu.org>]

https://gcc.gnu.org/g:c0852b51b7a68ada822955eb7ef83d933cc33e47

commit r13-2505-gc0852b51b7a68ada822955eb7ef83d933cc33e47
Author: Ian Lance Taylor <iant@golang.org>
Date:   Sat Sep 3 10:37:07 2022 -0700

    runtime: ignore __morestack function in runtime.Callers
    
    We were ignoring all functions starting with "__morestack_", but not
    the function "__morestack" itself.  Without this change, some tests
    such as recover.go started failing recently, though I'm not sure
    exactly what changed.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/427935

Diff:
---
 gcc/go/gofrontend/MERGE    | 2 +-
 libgo/runtime/go-callers.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index ca797045d66..dce38e727a7 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-d53e8a0e94e34dc609e34dd5e404debda2640cfb
+6543b7fc6da533eb976b37649a925e7fd5a521fa
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/runtime/go-callers.c b/libgo/runtime/go-callers.c
index 31783696a08..1d4dee66279 100644
--- a/libgo/runtime/go-callers.c
+++ b/libgo/runtime/go-callers.c
@@ -107,7 +107,7 @@ callback (void *data, uintptr_t pc, const char *filename, int lineno,
       p = function;
       if (__builtin_strncmp (p, "___", 3) == 0)
 	++p;
-      if (__builtin_strncmp (p, "__morestack_", 12) == 0)
+      if (__builtin_strncmp (p, "__morestack", 11) == 0)
 	return 0;
     }
   else if (filename != NULL)