20:00 marino 

devel/gps: Restore missing project properties switches

The project properties were missing several tabs in the "switches"
sections, but it wasn't immediately obvious why.  It turns out that this
was caused by a missing generated file (gnat_switches.py).  Restoring
that file along with having PATH set to the Ada compiler restored the
missing tabs.

The trick is that the generated file needs a texi file that is not present
in the distfile.  The texi file was discarded by gnat_util (and its parent
gccX), so the solution is change gnat_util to install the file at its own
DOCDIR.  Pregeneration of the gnat_switches.py is a bad idea IMO, so we
stick with the intended generation.

while here, install gps as gps_exe and create a wrapper named "gps" that

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