package/x11r7/xapp_mkfontscale: bump version to 1.2.1

package/x11r7/xapp_mkfontscale: bump version to 1.2.1

Updated license hash after upstream commit
https://gitlab.freedesktop.org/xorg/app/mkfontscale/commit/8609ad731b9c9c670a815c915055ae416d2396d8

Release notes:
https://lists.x.org/archives/xorg-announce/2019-March/002988.html

This version bump "now includes the mkfontdir script previously
distributed separately for compatibility with older X11 versions."

Removing the buildroot package host-xapp_mkfontdir will be done by
subsequent patches.

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