If one or more components are specified for update, only check if their
repository/repositories are dirty rather than checking all of the
configured repositories.
(From OE-Core rev: b03e710c88ad0c66cf731647f26e8441d0074cae)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>