[release] bump version to 13.2 rc1
Merge pull request #5066 from MartijnKaijser/13.2rc1

[release] bump version to 13.2 rc1
Merge branch 'Gotham' of https://github.com/xbmc/xbmc into Gotham
Merge branch 'Gotham' of https://github.com/Owersun/xbmc into Gotham