qmake expects the generator to be the same for each node in the tree
of subdirs, including the leaf projects, which caused failures when
qmake tried to recurse out to the leaf projects and run 'make', when
the leaf project was an Xcode project.
We now wrap the Xcode project in a meta-makefile that just
calls out to xcodebuild to do the actual work. This allows us
to get rid of the hacky generator detection, and use the macx-xcode
mkspec instead of setting the generator, which is much cleaner.
Change-Id: I2fed6a4dd6343b6a320eb459ecae824553bff459
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
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