Remove obsolete reference to enabling parallel build via local.conf.
Unify wording used to explain that local.conf and bblayers.conf have
been created based on defaults.
(From OE-Core rev: 0073679c60c813c7c8d62bff997feb30ce64543c)
Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>