Update schemes to only allow run.
Now it is possible to build/run/debug mobileExecutable as
well as desktop from within Xcode.
Xcode demands that the path to the debug executable it not relative,
this of course gives a portability problem.
The path selected are
~/develop/src/subsurface/build....
to at least give it a shine of not being fixed.
Signed-off-by: Jan Iversen <jani@apache.org>