Fix public issue #27: Add HAVE_CONFIG_H tests around the config.h inclusion in snappy-stubs-internal.h, which eases compiling outside the automake/autoconf framework. R=csilvers DELTA=5 (4 added, 1 deleted, 0 changed) Revision created by MOE tool push_codebase. MOE_MIGRATION=1152 git-svn-id: https://snappy.googlecode.com/svn/trunk@25 03e5f5b5-db94-4691-08a0-1a8bf15f6143