Initialize ARM test program variables

TestPrograms/test_arm_asimd.cxx

@@ -10,7 +10,7 @@
 
 int main(int argc, char* argv[])
 {
-	uint32x4_t x;
+	uint32x4_t x={0};
 	x=veorq_u32(x,x);
 	return 0;
 }

TestPrograms/test_arm_neon.cxx

@@ -3,7 +3,7 @@
 
 int main(int argc, char* argv[])
 {
-	uint32x4_t x;
+	uint32x4_t x={0};
 	x=veorq_u32(x,x);
 	return 0;
 }

TestPrograms/test_arm_sha.cxx

@@ -10,7 +10,7 @@
 
 int main(int argc, char* argv[])
 {
-	uint32x4_t y;
+	uint32x4_t y = {0};
 	y=vsha1cq_u32(y,0,y);
 	y=vsha1mq_u32(y,1,y);
 	y=vsha1pq_u32(y,2,y);