bridge is a tool used frequently, so install it
(From OE-Core rev: b1f67c7ea87bb9bd0fb642b33e66ea5595789afc)
Signed-off-by: Roy Li <rongqing.li@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>