xserver-xorg-common: fix LIC_FILES_CHKSUM

xserver-xorg-common: fix LIC_FILES_CHKSUM

* old value was actually from xserver-kdrive, use the same as
  xserver-xorg-1.10.1 and newer has
  ./xserver-kdrive.inc:LIC_FILES_CHKSUM = "file://COPYING;md5=3dd2bbe3563837f80ed8926b06c1c353"
  ./xserver-xorg-lite_1.10.1.bb:LIC_FILES_CHKSUM = "file://COPYING;md5=74df27b6254cc88d2799b5f4f5949c00"

(From OE-Core rev: 5c32d388d788e0d35a384e84765c2b66ccd593e4)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>