Allow GIT_SMART_HTTP to be passed through to the fetch command so that
servers that cannot use GIT_SMART_HTTP can be used by the fetcher.
(Bitbake rev: e5c97a85bed0436d48eeaac2e32962cfb5371d2f)
Signed-off-by: Liam R. Howlett <Liam.Howlett@WindRiver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>