Make do_configure do nothing by default as the base configure isn't
useful, and invoke the build API directly instead of writing a script.
In the future, this can simply call python3-build.
(From OE-Core rev: ccad9d0218ef69bdb8c708029445fcd661f1c490)
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>