[SYCL-MLIR] Set hip and cuda as unsupported targets for single_task.cpp (#1336)

Signed-off-by: Tsang, Whitney <[email protected]>

Author: whitneywhtsang

SYCL/Basic/single_task.cpp

@@ -3,6 +3,7 @@
 // RUN: %GPU_RUN_PLACEHOLDER %t.out
 // RUN: %ACC_RUN_PLACEHOLDER %t.out
 // REQUIRES: linux
+// UNSUPPORTED: hip || cuda
 
 #include <sycl/sycl.hpp>
 using namespace sycl;