util-linux.inc: Do not modify BPN

Changing BPN to be "util-linux" regardless if it is the util-linux
recipe or the util-linux-libuuid recipe that is being built was an
easy way to allow ${BPN} and ${BP} to be used in the SRC_URI for both
recipes. However, it causes problems for native.bbclass where there
are expectations that ${BPN} and ${PN} match each other.

Use "util-linux" directly in the SRC_URI instead to avoid the problem.

Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>