This function, to tidy a license string, is useful outside of recipetool
so move it to oe.license.
(From OE-Core rev: 9d57b53169bc60b281510c49e54123941a17a8f5)
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>