Update Clear Linux Project.

Update Clear Linux base+latest images to release 18520.

library/clearlinux

@@ -1,4 +1,4 @@
 # maintainer: William Douglas <[email protected]> (@bryteise)
 
-latest: git://github.com/clearlinux/docker-brew-clearlinux@1856b9f9d8340774f4a77171bac9e1476fc0b8c1
-base: git://github.com/clearlinux/docker-brew-clearlinux@1856b9f9d8340774f4a77171bac9e1476fc0b8c1
+latest: git://github.com/clearlinux/docker-brew-clearlinux@67fc950799a38873a74c42b68bbb2c35d7e9596f
+base: git://github.com/clearlinux/docker-brew-clearlinux@67fc950799a38873a74c42b68bbb2c35d7e9596f