More robust attribute binding
Adding attribute and uniform debug logging.
Checking to see if aniso filtering is available.

Change-Id: I2ed9d166ed7ff3df971d7af18b7a33f4e3ade928
diff --git a/rsProgram.h b/rsProgram.h
index a8f34c3..c93033b 100644
--- a/rsProgram.h
+++ b/rsProgram.h
@@ -26,6 +26,8 @@
 class ShaderCache;
 
 #define RS_SHADER_INTERNAL "//rs_shader_internal\n"
+#define RS_SHADER_ATTR "ATTRIB_"
+#define RS_SHADER_UNI "UNI_"
 
 class Program : public ObjectBase
 {