bug#28298: Downgrades in xfontsel and other packages using app-defaults

[Alex Kost]

Hello, commit 5dc8dd07b¹ removed a wrapper from xfontsel package.  And
now xfontsel looks "ugly" (not as intended).  You can simply check it:

  $ `guix build xfontsel`/bin/xfontsel

It doesn't look right, and also prints the following message:

  Warning: app-defaults file not properly installed.

Now if you run it like this:

  $ XAPPLRESDIR=/gnu/store/...-xfontsel-1.0.5/lib/X11/app-defaults 
/gnu/store/...-xfontsel-1.0.5/bin/xfontsel

it looks as it should.

Also the same downgrades probably take effect (I didn't check) with
'xfig' and 'xfd' packages (commits 97fedab1 and 5aae77e4).

So I think we should re-add the mentioned wrappers.

¹ 
http://git.savannah.gnu.org/cgit/guix.git/commit/?id=5dc8dd07b0c966842bfb984482df40892dc1c2ae

-- 
Alex