Otherwise libunwind support will be based on the contents of the sysroot, which
can cause problems.
(From OE-Core rev: 14cb8fe36fcb2dc20830fb4ba63ed1302255b61b)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>