[Patch] kbuild: fix a compile warning

[Amerigo Wang <amwang@redhat.com>]

I got this warning:

 HOSTCC  scripts/basic/fixdep
scripts/basic/fixdep.c: In function 'traps':
scripts/basic/fixdep.c:377: warning: dereferencing type-punned pointer will break strict-aliasing rules
scripts/basic/fixdep.c:379: warning: dereferencing type-punned pointer will break strict-aliasing rules

Patch below fixes it.

Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org> 

---
diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 8912c0f..72c1520 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -373,10 +373,11 @@ void print_deps(void)
 void traps(void)
 {
 	static char test[] __attribute__((aligned(sizeof(int)))) = "CONF";
+	int *p = (int *)test;
 
-	if (*(int *)test != INT_CONF) {
+	if (*p != INT_CONF) {
 		fprintf(stderr, "fixdep: sizeof(int) != 4 or wrong endianess? %#x\n",
-			*(int *)test);
+			*p);
 		exit(2);
 	}
 }