The Xcode generator does not support exclusive builds, but still
generates projects that contain both debug and release configurations,
each with hard-coded differences such as whether or not to strip or
to generate debug symbols.
As a stop-gap solution we allow projects and mkspecs to add extra
settings that are limited to a given build. Long term we want to
rewrite the Xcode generator to support exclusive builds, but that
is a much bigger task.
Change-Id: I85056164bb1b3c8c6e0cf66410348cca7138eca5
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>