crt: tests: update t_sigv

Previously, this test would simply print an error message if SIGSEGV signal was
not raised. Instead, exit with non-zero to signal an error.

Signed-off-by: Kirill Makurin <maiddaisuki@outlook.com>
Signed-off-by: LIU Hao <lh_mouse@126.com>

mingw-w64-crt/testcases/t_sigv.c

diff --git a/mingw-w64-crt/testcases/t_sigv.c b/mingw-w64-crt/testcases/t_sigv.c
index a860723..08a069d 100644
--- a/mingw-w64-crt/testcases/t_sigv.c
+++ b/mingw-w64-crt/testcases/t_sigv.c
@@ -1,6 +1,7 @@
 #include <setjmp.h>
 #include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 jmp_buf buf;
 
@@ -25,7 +26,8 @@
  {
   puts("Ready to catch");
   v = *ptr;
-  puts("Bad");
+  puts("ERROR: program continued");
+  _exit (EXIT_FAILURE);
  }
  else
  {