If SDKMACHINE is not set, the toolchain will be built but the tarball
installer will not run. A better choice is to use SDK_ARCH because, even
if SDKMACHINE is not set, SDK_ARCH is set, by default, to BUILD_HOST.
(From OE-Core rev: b6d391903ae8baf902fa142a58533857ade6afd3)
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>