Allow to set ANDROID_BUILDSPEC as path of

So that clients can set a custom without adding at the top dir.

Change-Id: I4d993e24cea19caffdfe85822cdfdb9483cdfce7
diff --git a/core/ b/core/
index 41e60ea..d486ed3 100644
--- a/core/
+++ b/core/
@@ -117,7 +117,10 @@
 # If this file doesn't exist, the environemnt variables will
 # be used, and if that doesn't work, then the default is an
 # arm build
--include $(TOPDIR)
 # ---------------------------------------------------------------
 # Define most of the global variables.  These are the ones that