x11-fonts/font-misc-ethiopic: Update to 1.0.4

Update x11-fonts/font-misc-ethiopic to 1.0.4
Add LICENSE
Change to use pkg-plist instead of a split between PLIST_FILES and
pkg-plist.
Add NO_ARCH
Changelog and announcement:
https://lists.x.org/archives/xorg-announce/2020-August/003055.html