[PATCH][ARM][Testsuite] Fix prototype in vst1Q_laneu64-1.c

[Wilco Dijkstra]

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

Committed as trivial fix.

ChangeLog
2016-07-06  Wilco Dijkstra  <wdijk...@arm.com>

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

diff --git a/gcc/testsuite/gcc.target/arm/vst1Q_laneu64-1.c 
b/gcc/testsuite/gcc.target/arm/vst1Q_laneu64-1.c
index 
5f4c927b6e0af9e9e3885e5e1fa25ec21fd53c78..de4e92a0b4aa5121864e2a78f20561168bb21dfa
 100644
--- a/gcc/testsuite/gcc.target/arm/vst1Q_laneu64-1.c
+++ b/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);