Upgrade opus 1.0.2 -> 1.1
Upgrade opusfile 0.2 to 0.5
Upgrade libogg 1.3.0 to 1.3.1

This is a minor bugfix release with few changes
When cross compiling on mingw32, make sure it finds a CC
Merge branch 'features/upgrade-opusfile-0.5' of https://github.com/xhairball/ioq3 into opus_update
Merge branch 'features/upgrade-opus-1.1' of https://github.com/xhairball/ioq3 into opus_update

Conflicts:
	Makefile
Merge pull request #41 from xhairball/fixes/check-cc-when-cross-compiling-mingw32

When cross compiling on mingw32, make sure it finds a CC