Fix compilation of tests using printf extension. (intel/llvm-test-suite#1075)

intel@2e1c36f mandates to include a non-standard header.

Author: bader

SYCL/DeviceLib/built-ins/printf.cpp

@@ -7,12 +7,13 @@
 // RUN: %GPU_RUN_PLACEHOLDER %t.out %GPU_CHECK_PLACEHOLDER
 // RUN: %ACC_RUN_PLACEHOLDER %t.out %ACC_CHECK_PLACEHOLDER
 
-#include <CL/sycl.hpp>
+#include <sycl/ext/oneapi/experimental/builtins.hpp>
+#include <sycl/sycl.hpp>
 
 #include <cstdint>
 #include <iostream>
 
-using namespace cl::sycl;
+using namespace sycl;
 
 // According to OpenCL C spec, the format string must be in constant address
 // space

SYCL/ESIMD/printf.cpp

@@ -20,13 +20,14 @@
 
 #include "esimd_test_utils.hpp"
 
-#include <CL/sycl.hpp>
 #include <sycl/ext/intel/esimd.hpp>
+#include <sycl/ext/oneapi/experimental/builtins.hpp>
+#include <sycl/sycl.hpp>
 
 #include <cstdint>
 #include <iostream>
 
-using namespace cl::sycl::ext;
+using namespace sycl::ext;
 
 // According to OpenCL C spec, the format string must be in constant address
 // space