Now slang supports "-I" options.

Change-Id: I32aef6c913d9d30f9982a593397145f1562aecf9
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 69ed4f5..9209878 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -93,11 +93,12 @@
 LOCAL_NDK_VERSION:=
 LOCAL_NO_EMMA_INSTRUMENT:=
 LOCAL_NO_EMMA_COMPILE:=
-LOCAL_PROGUARD_ENABLED:= # '',optonly,full,custom
+LOCAL_PROGUARD_ENABLED:= # '',optonly,full,custom,disabled
 LOCAL_PROGUARD_FLAGS:=
 LOCAL_EMMA_COVERAGE_FILTER:=
 LOCAL_WARNINGS_ENABLE:=
 LOCAL_MANIFEST_FILE:=
+LOCAL_RENDERSCRIPT_INCLUDES:=
 
 # Trim MAKEFILE_LIST so that $(call my-dir) doesn't need to
 # iterate over thousands of entries every time.