Otherwise some of the call traces are cut off

Otherwise we can't determine the PID of the main process and
can't kill it properly during tests

The arguments were reveresed an so we expanded to the empty statement.

We're doing this out of the shell now

so we don't have to remember the options

Use
   EXEC=valgrind _build/run

This makes debugging way simpler

It's a stupid stub.

They should not have ended up there in the first place

Just enough to make gsd-power start up

This adds a common base class PhoshMenu for all top panel menus so
phosh.c itself doesn't need to care about the details and we don't
duplicate the code.

(based on gnome-shell/maynard)

We switch to a private shell protocol from here on.  This might get
folded back into weston's desktop shell protocol at a later point when
we see what else is needed.