move uncrypt from init.rc to uncrypt.rc

Move uncrypt from /init.rc to /system/etc/init/uncrypt.rc using the
LOCAL_INIT_RC mechanism

Bug 23186545

Change-Id: Ib8cb6dffd2212f524298279787fd557bc84aa7b9
diff --git a/uncrypt/Android.mk b/uncrypt/Android.mk
index f31db42..6422cb2 100644
--- a/uncrypt/Android.mk
+++ b/uncrypt/Android.mk
@@ -26,4 +26,6 @@
 
 LOCAL_STATIC_LIBRARIES := libbase liblog libfs_mgr libcutils
 
+LOCAL_INIT_RC := uncrypt.rc
+
 include $(BUILD_EXECUTABLE)