Add -config intel option to allow building for Intel targets only on Mac.

This doesn't change building of the used libraries, so librbspeex etc. are
still built as universal libraries. Building for Intel also targets 10.5 and up
instead of 10.4 and up which is targeted by default. Addresses FS#10938.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27997 a1c6a512-1295-4272-9138-f99709370657
1 file changed