classes/populate_sdk_ext: fail if SDK_ARCH != BUILD_ARCH
The extensible SDK relies upon uninative, and with the way that
uninative works, the build system architecture must be the same as the
SDK architecture or the extensible SDK won't be usable. At some point in
future hopefully we can remove this limitation, but until then it's
disingenuous to allow this to build, so add a check to ensure
SDK_ARCH == BUILD_ARCH and fail if it isn't.
(From OE-Core master rev:
9e30e849eda3b0a0c54d3f7ed0102760fdaef06c)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
