re PR go/90614 (gcc-9.1.0/libgo/go/syscall/wait.c:54:22: error: unused...

re PR go/90614 (gcc-9.1.0/libgo/go/syscall/wait.c:54:22: error: unused parameter ‘w’ [-Werror=unused-parameter] Continued (uint32_t *w))

	PR go/90614
    syscall: avoid unused parameter error if WIFCONTINUED not defined
    
    Fixes https://gcc.gnu.org/PR90614
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/178997

From-SVN: r271638

gcc/go/gofrontend/MERGE

-54aacecc8167bfba8420cb7b245787ff80bde61b
+578c4fb6132801db8e9d11d741d2394e07c5a398
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/syscall/wait.c

@@ -51,7 +51,7 @@ extern _Bool Continued (uint32_t *w)
   __asm__ (GOSYM_PREFIX "syscall.WaitStatus.Continued");
 
 _Bool
-Continued (uint32_t *w)
+Continued (uint32_t *w __attribute__ ((unused)))
 {
   return WIFCONTINUED (*w) != 0;
 }