Update 'streams' test to have accessor in it

Author: Erich Keane

clang/test/SemaSYCL/Inputs/sycl.hpp

@@ -219,6 +219,7 @@ class handler {
 };
 
 class stream {
+  accessor<int, 1, access::mode::read> acc;
 public:
   stream(unsigned long BufferSize, unsigned long MaxStatementSize,
          handler &CGH) {}