mark UNIX scripts as executable


git-svn-id: svn://svn.code.sf.net/p/mediainfo/code/MediaInfo/trunk@6498 45c5ae6f-87cc-4fd0-92ee-e4f023fd80da
gnu/makefile: add osx-specific framework


git-svn-id: svn://svn.code.sf.net/p/mediainfo/code/MediaInfo/trunk@6499 45c5ae6f-87cc-4fd0-92ee-e4f023fd80da