devel/libpciaccess: Update to 0.16, fix regression
Update devel/libpciaccess to 0.16. All local patches have been included in
this version, so delete those files.
Add a patch to fix a regression when using certain video drivers,
xf86-video-mga, xf86-video-nv and xf86-video-vesa, at least, have been
reported to have issues with 0.14.
Approved by: ports-secteam (miwi)