directed tests: Enable remaining tests in HIT infrastructure

Change-Id: I800ee00d6f7d339bb5d2ed898a16362a8541ed3a

tests/src/kernel/hipLanguageExtensions.cpp

@@ -21,6 +21,12 @@ THE SOFTWARE.
 */
 // Collection of code to make sure that various features in the hip kernel language compile.
 
+/* HIT_START
+ * BUILD: %t %s ../test_common.cpp HCC_OPTIONS --stdlib=libc++
+ * RUN: %t
+ * HIT_END
+ */
+
 #include <hip_runtime.h>
 #include <test_common.h>