[CFT] Mesa 17.3 update (mesa-libs, mesa-dri, libosmesa, clover)

[Jan Beich]

New minor Mesa release is available[1], see bug 223195[2] for the patch.
I'd like users to test on Radeon and Intel graphics using kernel drivers
shipped with FreeBSD 10.3 and 11.1 as those're more likely to regress than
drm-next-kmod. Make sure to check OpenGL still works (if it did before)
and EGL apps (like mpv) don't crash due to lack of DRI3. In case of issues
try various environment variables[3] or, at least, increase verbosity,
attach Xorg.log and reply here.

# Apply
$ fetch -qo /tmp/mesa-17.3.0.diff 'https://bugs.freebsd.org/bugzilla/attachment.cgi?id=188632'
$ patch -Efsp1 -i /tmp/mesa-17.3.0.diff -d /usr/ports
$ make all deinstall install clean -C /usr/ports/graphics/mesa-libs
$ make all deinstall install clean -C /usr/ports/graphics/mesa-dri

# Undo
$ patch -REfsp1 -i /tmp/mesa-17.3.0.diff -d /usr/ports
$ make all deinstall install clean -C /usr/ports/graphics/mesa-libs
$ make all deinstall install clean -C /usr/ports/graphics/mesa-dri

--
[1] https://www.mesa3d.org/relnotes/17.3.0.html
[2] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223195
[3] https://www.mesa3d.org/envvars.html