Dependency for python3-cryptography 3.4.x+
Only native rustc is supported at this time in oe-core,
therefore it makes no sense to try to build for target.
(From OE-Core rev: 8eaafc114c196fbab2070bfb600634306deef527)
Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
