Updated xawtv to latest upstream release 3.102.

Other changes:
1) updated dependencies; useflags and listed new upstream
2) removed unneeded patches and other outdated(?) cruft from the ebuild
3) Removed the "tv-fonts" as those appear no longer maintained

fixes Gentoo bug: https://bugs.gentoo.org/show_bug.cgi?id=358013
Merge branch 'release/xawtv'

Updated xawtv to latest upstream version 3.102. This is needed as current version in
the tree does not support v4l2 and hence no longer works for newer kernels.