python-3.5-manifest: Add imp to importlib

python-3.5-manifest: Add imp to importlib

The imp python module is the forerunner of importlib. Include imp in
the importlib subpackage instead of the misc subpackage so that it can
be depended on without bringing in a bunch of unrelated, unused modules.

(From OE-Core rev: 512334f102a33833d39af53467894315f0715d07)

Signed-off-by: George McCollister <george.mccollister@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>