Bug#813727: kfreebsd-10: update clang version

Source: kfreebsd-10 Control: block 812778 by -1 Currently freebsd-10 build-depends on clang-3.5 which is going to be removed (see bug #812778), so please update to a newer version.

Bug#790358: please don't depend on clang-3.4

Package: kfreebsd-11 Control: block 783516 by -1 kfreebsd-11 currently depends on clang-3.4 which is going to be removed (see bug #783516), so please update the dependency to a newer version. Also, if possible, please do the same for kfreebsd-10. -- To UNSUBSCRIBE, email to debian-bsd-requ...@l