Similarly to native/cross disable this since otherwise the packagedata
can be marked as machine specific and if you switch machines
which share an architecture, you'll get toolchain overlapping files
errors.
(From OE-Core rev: 96d557be3dedd6aea6199b3d28fbb7f5549fad69)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>