Sync minilzo from 2.03 to 2.07.

This commit is UNTESTED. I don't have any framegrabbers. However
there's no reason it shouldn't work as it's just a minor version bump.

Refs LMS-2014-06-16-1, CVE-2014-4607
Move minilzo to external. Hopefully this won't break any builds ...
Missed some files in [0540f58]
Libmythminilzo is a static lib, not a shared lib.
Fix build of mythtranscode