package/x11r7/xdriver_xf86-video-fbturbo: fix driver loading

Port two xf86-video-fbdev upstream patches to xf86-video-fbturbo fixing
incompatibility with latest xorg release and add mandatory module loading
section to installed xorg.conf:

- patch 0002-Use-own-thunk-functions-instead-of-fbdevHW-Weak.patch, fixes:
  [    12.638] (II) LoadModule: "fbturbo"
  [    12.639] (II) Loading /usr/lib/xorg/modules/drivers/fbturbo_drv.so
  [    12.642] (EE) Failed to load /usr/lib/xorg/modules/drivers/fbturbo_drv.so: /usr/lib/xorg/modules/drivers/fbturbo_drv.so: undefined symbol: shadowUpdatePackedWeak
  [    12.642] (EE) Failed to load module "fbturbo" (loader failed, 0)

- patch 0003-Update-for-1.20-ABI.patch, fixes:
  [    12.551] (II) LoadModule: "fbturbo"
  [    12.553] (II) Loading /usr/lib/xorg/modules/drivers/fbturbo_drv.so
  [    12.556] (EE) Failed to load /usr/lib/xorg/modules/drivers/fbturbo_drv.so: /usr/lib/xorg/modules/drivers/fbturbo_drv.so: undefined symbol: xf86DisableRandR
  [    12.556] (EE) Failed to load module "fbturbo" (loader failed, 0)

- patch 0004-xorg.conf-add-mandatory-modules-fb-shadow-fbdevhw.patch, fixes:

  module fbdevhw:
  [   303.906] (II) LoadModule: "fbturbo"
  [   303.906] (II) Loading /usr/lib/xorg/modules/drivers/fbturbo_drv.so
  [   303.907] (EE) Failed to load /usr/lib/xorg/modules/drivers/fbturbo_drv.so: /usr/lib/xorg/modules/drivers/fbturbo_drv.so: undefined symbol: fbdevHWSave
  [   303.907] (EE) Failed to load module "fbturbo" (loader failed, 0)
  [   303.907] (EE) No drivers available.

  module shadow:
  [   426.403] (II) LoadModule: "fbturbo"
  [   426.404] (II) Loading /usr/lib/xorg/modules/drivers/fbturbo_drv.so
  [   426.404] (EE) Failed to load /usr/lib/xorg/modules/drivers/fbturbo_drv.so: /usr/lib/xorg/modules/drivers/fbturbo_drv.so: undefined symbol: shadowRemove
  [   426.404] (EE) Failed to load module "fbturbo" (loader failed, 0)
  [   426.404] (EE) No drivers available.

  module fb:
  [   471.912] (II) LoadModule: "shadow"
  [   471.913] (II) Loading /usr/lib/xorg/modules/libshadow.so
  [   471.913] (EE) Failed to load /usr/lib/xorg/modules/libshadow.so: /usr/lib/xorg/modules/libshadow.so: undefined symbol: fbGetScreenPrivateKey
  [   471.913] (EE) Failed to load module "shadow" (loader failed, 0)

Fixes:
  - https://bugs.busybox.net/show_bug.cgi?id=13816
  - http://lists.busybox.net/pipermail/buildroot/2021-June/311763.html



Reported-by: Jürgen Wack <juergen.wack@gmx.de>
Reported-by: Derek T <derek.tata1@gmail.com>
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
[yann.morin.1998@free.fr: fix check-package errors]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>