We need to provide autoconf-natviesdk in meta-toolchain, the
gnu-config-nativesdk is required by it.
(From OE-Core rev: 5e134b60773fa948c586dae777a6e75dce29d27d)
Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>