In the Ethiopian keyboard layout, the dead vowel keys do not produce
<u> and so on, but instead produce
<U+FE75> and so on,
so the compose sequences should use those latter code points.
Also, include the basic compose sequences from en_US.UTF-8/Compose, so that, when switching to a different layout in the Ethiopian locale, all the usual compose sequences work too.
Signed-off-by: Benno Schulenberg email@example.com