automake: Merge *_CXX_FILES variables in the glsl build.

Reviewed-by: Chad Versace <chad.versace@linux.intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
diff --git a/src/glsl/Android.mk b/src/glsl/Android.mk
index f975d03..f5006ab 100644
--- a/src/glsl/Android.mk
+++ b/src/glsl/Android.mk
@@ -36,8 +36,7 @@
 
 LOCAL_SRC_FILES := \
 	$(LIBGLCPP_FILES) \
-	$(LIBGLSL_FILES) \
-	$(LIBGLSL_CXX_FILES)
+	$(LIBGLSL_FILES)
 
 LOCAL_C_INCLUDES := \
 	external/astl/include \
@@ -59,7 +58,6 @@
 LOCAL_SRC_FILES := \
 	$(LIBGLCPP_FILES) \
 	$(LIBGLSL_FILES) \
-	$(LIBGLSL_CXX_FILES) \
 	$(GLSL_SRCDIR)/builtin_compiler/builtin_stubs.cpp \
 	$(GLSL_COMPILER_CXX_FILES)