Move some internal headers from "include/hip/" to src.

Change-Id: I7041bd5c803d9318979f4a7c1d658445c614691e

src/hip_event.cpp

@@ -21,8 +21,8 @@ THE SOFTWARE.
 */
 
 #include "hip/hip_runtime.h"
-#include "hip/hcc_detail/hip_hcc.h"
-#include "hip/hcc_detail/trace_helper.h"
+#include "hip_hcc.h"
+#include "trace_helper.h"
 
 //-------------------------------------------------------------------------------------------------
 //-------------------------------------------------------------------------------------------------