Updates for omnibus-software for AIX

:construction: 
Compiler flags and updates to allow embedded software to be built on AIX with the XLC toolchain.
Keep in mind that the anxiety over keeping AIX its own special thing and not polluting our normal builds has just made it even more of a problem child and made it that much worse.  The more its integrated, then the more we won't have to be tracking down two years down the road why Linux behaves one way and AIX behaves a different way.  The whole point of omnibus is consistency across operating systems as much as is possible.  Deviations that make AIX special because AIX is special become a self-fulfilling prophecy.  We also have an opening right now to disable the cxx-bindings before we ship chef-12 and serdar is going to be working on the RC candidate this weekend, so if we're going to rip this out the absolute best time to do that is right this second.