am ae49acbd: am 1acb1b64: Merge changes I62504bad,I16208cca,I4e4ceec6

* commit 'ae49acbde766e2e683d3dd026e69f2416da766b1':
  add new gen/ directory for generated sources
  warn on LOCAL_MODULE_PATH in multiarch shared libraries
  Support LOCAL_MODULE_RELATIVE_PATH