Update to Mesa 10.3.0-rc3.

Split up the dri plist in new and old, all the %%OLD%% / %%NEW%% tags where
giving me a headache and where hiding valid files that should be installed.

Tested by:	dumbbell@


git-svn-id: https://trillian.chruetertee.ch/svn/ports/branches/experimental@1510 058c260c-8361-11dd-a0ac-aa2bafec7d09
x11-servers/xorg-server: Update devd patch to support sysmouse



git-svn-id: https://trillian.chruetertee.ch/svn/ports/branches/experimental@1511 058c260c-8361-11dd-a0ac-aa2bafec7d09