Merge GDB 7.5.1

sim/testsuite/sim/cris/c/sigreturn2.c

 /* Check that TRT happens for spurious sigreturn calls.  Multiple threads.
 #notarget: cris*-*-elf
 #cc: additional_flags=-pthread
 #xerror:
 #output: Invalid sigreturn syscall: no signal handler active (0x1, 0x2, 0x3, 0x4, 0x5, 0x6)\n
-#output: program stopped with signal 4.\n
+#output: program stopped with signal 4 (*).\n
 */
 
 #include <stdlib.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <pthread.h>
 #include <sys/types.h>
 #include <sys/syscall.h>
 #include <signal.h>
@@ skipping 12 matching lines @@
   pthread_t th_a;
   if (pthread_create (&th_a, NULL, process, (void *) "a") == 0)
     {
       int err = syscall (SYS_sigreturn, 1, 2, 3, 4, 5, 6);
       if (err == -1 && errno == ENOSYS)
         printf ("ENOSYS\n");
     }
   printf ("xyzzy\n");
   exit (0);
 }