Install path support for vendor modules.

Bug: 5284764
Set "LOCAL_PROPRIETARY_MODULE := true" to install module to vendor
partition.

Change-Id: I1301acc10664a12e313f3b868d9fd6400ac8b133
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index c5e4cc7..8c5a40e 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -112,6 +112,7 @@
 LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,full
 LOCAL_PROTOC_FLAGS:=
 LOCAL_NO_CRT:=
+LOCAL_PROPRIETARY_MODULE:=
 
 # Trim MAKEFILE_LIST so that $(call my-dir) doesn't need to
 # iterate over thousands of entries every time.