Merge pull request #2018 from AndreMiras/feature/rebuild_updated_recipes_android_home

Exposes ANDROID_SDK_HOME to rebuild_updated_recipes

Author: AndreMiras

Makefile

@@ -31,6 +31,7 @@ test:
 	@if test -n "$$CI"; then .tox/py$(PYTHON_MAJOR_MINOR)/bin/coveralls; fi; \
 
 rebuild_updated_recipes: virtualenv
+	ANDROID_SDK_HOME=$(ANDROID_SDK_HOME) ANDROID_NDK_HOME=$(ANDROID_NDK_HOME) \
 	$(PYTHON) ci/rebuild_updated_recipes.py
 
 testapps/python2/armeabi-v7a: virtualenv