Clean up. Now require uim-vi-xtelex

Bc generating xtelex.scm is complex, we will create new package for it.
Though the name is (uim-vi-xtelex) the new package will contains many
stuff (xvni, possibly xtelex-ipa,...).

In this PKGBUILD we will generate some faked data by using (scim2uim.awk).
This ensures that the build process can record our IM (xtelex, xvni).
The use of "A A" as input for (scim2uim.awk) is tricky: it is to avoid
some warning message from the tool which requires both lower/upper case
strings in its input