weston: Bump version to 3.0.0

weston: Bump version to 3.0.0

Update weston release to 3.0.0.
Two patches added:
- fix-missing-header.patch:
        fix a build issue when musl is used as libc.
- weston-gl-renderer-Set-pitch-correctly-for-subsampled-textures.patch:
        fix display issue with YUV420/I420 format, that could result in a crash.

Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.co.uk>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>