xf86-video-intel: update to 2.21.10.
Merge pull request #87 from Ypnose/master

New package: slock
libXv: update to 1.0.9.
curl: update to 7.31.0.
gdk-pixbuf: update to 2.28.2.
New package: snappy-1.1.0.
slock: fix crossbuilds fatal errors