Add the ability to turn on proguard for java targets, and to call aapt
to generate a rules file for proguard for stuff from the manifest and
other resources that need to be kept.
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 28044c4..a7eba3f 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -87,6 +87,8 @@
LOCAL_SDK_VERSION:=
LOCAL_NO_EMMA_INSTRUMENT:=
LOCAL_NO_EMMA_COMPILE:=
+LOCAL_PROGUARD_ENABLED:= # '',optonly,full,custom
+LOCAL_PROGUARD_FLAGS:=
# Trim MAKEFILE_LIST so that $(call my-dir) doesn't need to
# iterate over thousands of entries every time.