mkfontscale: upgrade 1.2.1 -> 1.2.2

CHanges:

Fix spelling/wording issues
gitlab CI: add a basic build test
Build xz tarballs instead of bzip2
Use case insensitive comparison for T1 font weight
Add "ExtraBold" as a valid T1 font weight.

temporarily override SRC_URI which is hard-coded in xorg-app-common.inc
since new versions of packages use a new compression format - .tar.xz

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 7ac5e224)
Signed-off-by: Steve Sakoman <steve@sakoman.com>