Disable forced explicit selection of public vs internal HSA interfaces.

Temporary to reenable OCL builds on TC.

Change-Id: Ia81f2f9a9dd10ae8ce9627313247a586a8711584

runtime/hsa-runtime/core/inc/hsa_internal.h

@@ -417,7 +417,7 @@ namespace HSA
 #ifdef BUILDING_HSA_CORE_RUNTIME
 //This using declaration is deliberate!
 //We want unqualified name resolution to fail when building the runtime.  This is a guard against accidental use of the intercept layer in the runtime.
-using namespace HSA;
+//using namespace HSA;
 #endif
 
 #endif