weston: Fix toytoolkit rotation missing from libweston12

weston: Fix toytoolkit rotation missing from libweston12

Turns out we missed a fix for libweston12, which we should've included
it. Carry the fix until a new libweston12 point release will released.

Bug-AGL: SPEC-4915
Change-Id: I77cda5ff5b19b5cd15cd2b82548a4af6a06ac32a
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/29257
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>