autoconf: fix nativesdk rdepends
Fixes this build error:
| error: Failed dependencies:
| m4 is needed by autoconf-nativesdk-2.68-r4.x86_64
| gnu-config is needed by autoconf-nativesdk-2.68-r4.x86_64
NOTE: package meta-toolchain-1.0-r6: task do_populate_sdk: Failed
ERROR: Task 8 (.../meta/recipes-core/meta/meta-toolchain.bb,
do_populate_sdk) failed with exit code '1'
(From OE-Core rev:
df8d88e864fb6bdecf5c82b25c0252c3d54157ad)
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Joshua Lock <josh@linux.intel.com>
