Update LibreOffice to 5.0.1.
Unfortunately, LibreOffice project completely dropped support for pre-C++11
compilers and libraries since 4.4. Therefore, we cannot easily build it on
FeeBSD 9.x any more unless the system was rebuilt with WITH_CLANG_IS_CC and
WITH_LIBCPLUSPLUS. If user is unable to upgrade the system for some reason,
the old port, i.e., 4.3.7, is still available from devel/libreoffice4 (with
no language packs).