intel: Support GLSL compiling in less intrusive way

Removed all the extension semantics. Support for compiling GLSL in the
driver is intended to be a tempory feature and these changes minimize
the impact on the driver and make it easier to remove in the future.
diff --git a/tests/xgltestframework.h b/tests/xgltestframework.h
index fe9cfd2..becf085 100644
--- a/tests/xgltestframework.h
+++ b/tests/xgltestframework.h
@@ -27,6 +27,7 @@
 #include "xglimage.h"
 #include "ShaderLang.h"
 #include "GLSL450Lib.h"
+#include "icd-bil.h"
 
 #include <stdlib.h>
 #include <stdio.h>