Avoid invalid qmake code in macOS-specific pluginloader test

You cannot manipulate variables in custom target dependencies, so the
following code was invalid:

i386_d.depends = EXPORT_VALID_ARCHS=i386

In order to still build the fat binary, we split the project in four,
one for each architecture, plus one to create the final package.

Change-Id: If08cf54e2e4098a7e10df41b7ea8d2bf699f58be
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

0 files changed, 0 insertions, 0 deletions