package/{mesa3d, mesa3d-headers}: bump version to 10.5.3

Upstream tarball now contains more pre-generated files, therefore we can remove
dependencies to host-python and host-gettext, quote from
http://lists.freedesktop.org/archives/mesa-announce/2015-April/000150.html:
"xmlpool: don't forget to ship the MOS
configure.ac: error out if python/mako is not found when required"

Fixes python3-related build error
http://autobuild.buildroot.net/results/7a5/7a5e53861bce6854265867e6e8525aabffb1d473/
http://autobuild.buildroot.net/results/ce4/ce45f986c3943b8ced3b15a0ebd1dc03fc7b7dcc/
http://autobuild.buildroot.net/results/1ce/1ce2509c8abb7483397c7d0f21c299095e94a254/



Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>