kbuild: Fix unaligned access in sanity check

fixdep does a sanity check to make sure that it got endianness
and sizeof(int) right. As opposed to the main loops, this sanity
check forgot to ensure proper alignment.

scripts/fixdep.c

@@ -348,7 +348,7 @@ void print_deps(void)
 
 void traps(void)
 {
-	char *test = "CONF";
+	static char test[] __attribute__((aligned(sizeof(int)))) = "CONF";
 
 	if (*(int *)test != INT_CONF) {
 		fprintf(stderr, "fixdep: sizeof(int) != 4 or wrong endianess? %#x\n",