Fix prototype in vst1Q_laneu64-1.c to unsigned char*.

    gcc/testsuite/
	* gcc.target/arm/vst1Q_laneu64-1.c (foo): Use unsigned char*.

From-SVN: r238046

gcc/testsuite/ChangeLog

+2016-07-06  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	* gcc.target/arm/vst1Q_laneu64-1.c (foo): Use unsigned char*.
+
 2016-07-06  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
 
 	PR target/50739	

gcc/testsuite/gcc.target/arm/vst1Q_laneu64-1.c

@@ -11,7 +11,7 @@
 unsigned char dummy_store[1000];
 
 void
-foo (char* addr)
+foo (unsigned char* addr)
 {
   uint8x16_t vdata = vld1q_u8 (addr);
   vst1q_lane_u64 ((uint64_t*) &dummy_store, vreinterpretq_u64_u8 (vdata), 0);