Add support for building modules for Perl 5.16

Currently only tested on MacOS 10.9 (Mavericks). Media::Scan still failing.

Perl 5.16 would be using most recent version of Class::XSAccessor (1.18).
Fix hints files - add patch for custom hints file in libmediascan.
Fix path to patch file for bdb
Fix building for perl 5.16 on Linux
Merge branch 'public/feature/7.7-perl516' into public/7.7