xf86-video-intel fixes for upcoming X-server release

[Enrico Weigelt, metux IT consult]

Hello folks,

here's a queue for xf86-video-intel driver, in order to keep up with changes
in X-server API.

shortlog:

Enrico Weigelt, metux IT consult (16):
      meson.build: fix missing Xv dependencies
      sna: stop using obsolete type aliases
      tools: fix FTBS on FreeBSD
      backlight: use system() instead of System()
      sna: use GCPtr instead of GC *
      gitlab CI: common scripts for driver builds
      gitlab CI: add pipeline for building against various Xserver releases
      stop using obsolete xf86BlockSIGIO() and xf86UnblockSIGIO()
      uxa: stop calling deprecated xf86_reload_cursors()
      use XNFalloc() instead of xnfalloc
      use XNFcallocarray() instead of xnfcalloc macro
      sna: use xserver's bswap_32()
      meson.build: increase required version
      Define __container_of only if not defined yet.
      use dixDestroyPixmap() instead of direct driver call
      use xf86NameCmp() instead of xf86nameCompare()


have fun,
--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info at metux.net -- +49-151-27565287