Fix public issue #9: Add -Wall -Werror to automake flags. (This concerns automake itself, not the C++ compiler.) R=csilvers DELTA=4 (3 added, 0 deleted, 1 changed) Revision created by MOE tool push_codebase. MOE_MIGRATION=993 git-svn-id: https://snappy.googlecode.com/svn/trunk@11 03e5f5b5-db94-4691-08a0-1a8bf15f6143