package/x11r7/xserver_xorg-server: security bump version to 1.20.9

package/x11r7/xserver_xorg-server: security bump version to 1.20.9

Fixes CVE-2020-14345, CVE-2020-14346, CVE-2020-14361 & CVE-2020-1436:
https://lists.x.org/archives/xorg-announce/2020-August/003058.html

Removed patch 0002, not needed anymore due to upstream commit
https://cgit.freedesktop.org/xorg/xserver/commit/configure.ac?h=server-1.20-branch&id=c601c8faf54ff9e3bcbc653421828d71042deef7

Build-tested with wayland:
checking for a useful monotonic clock ......
checking whether CLOCK_MONOTONIC is declared... yes
guessing yes

Removed patch 0007, included in upstream release.

Rebased and renumbered remaining patches.

Reformatted license hashes.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>