b43-fwcutter: update 015 -> 018
libdrm: minor update 2.4.52 -> .54

Including support for AMD Mullins chips.
mesa: bugfix update 10.1.1 -> .2

Contains many driver fixes.
xorg: minor update of xf86-input-{evdev,synaptics}
gst-plugins-base: update from 1.2.3 to 1.2.4 (in #2440)