Updated to Clang 3.5a.

Change-Id: I8127eb568f674c2e72635b639a3295381fe8af82
diff --git a/test/SemaCUDA/cuda.h b/test/SemaCUDA/cuda.h
index 26a8df0..a9a4595 100644
--- a/test/SemaCUDA/cuda.h
+++ b/test/SemaCUDA/cuda.h
@@ -7,6 +7,7 @@
 #define __global__ __attribute__((global))
 #define __host__ __attribute__((host))
 #define __shared__ __attribute__((shared))
+#define __launch_bounds__(...) __attribute__((launch_bounds(__VA_ARGS__)))
 
 struct dim3 {
   unsigned x, y, z;