Translate TUNE_PKGARCH to find the right file (this
used to work because tune for qemux86-64 used to be
x86_64 now it's core2-64)
Also, while using packagedata was nice, it's harder to make
the test exportable and runnable outside of the
build system. (where oe.packagedata isn't available)
Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
