Fix gitlab CI

First, install xorgproto from git before building the Xserver

Xserver git is now failing to build due to:

Dependency presentproto found: NO found 1.3 but need: '>= 1.4'

Copied from xf86-input-keyboard!10 (merged)

Second, add an include for sys/stat.h to bsd_mouse.c since xorg/xserver@5057c716 stopped including it in xf86_OSlib.h.