various minor fixes created while i worked on getting *every* Asterisk module to...

various minor fixes created while i worked on getting *every* Asterisk module to build on laptop in dev mode:

remove weird pre-setting of LUA paths; they are not necessary; also use the proper path for including the files in pbx_lua.c

add searching for OpenAIS libraries in /usr/lib/openais if a path is not specified; not sure if this is really the optimal solution, but it works

make the compiler shut up about some ignored function results in pbx_gtkconsole; this module is badly coded anyway

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@126356 65c4cc65-6c06-0410-ace0-fbb531ad65f3