util-linux: break out new package util-linux-hwclock

util-linux: break out new package util-linux-hwclock

We'd like to include the util-linux version of hwclock in images without
having to include all of util-linux. To make this possible, break out
hwclock into its own package.

(From OE-Core rev: 7c0429827d1232c8f1b439a73af6064602ec43e7)

Signed-off-by: Richard Tollerton <rich.tollerton@ni.com>
Signed-off-by: Ben Shelton <ben.shelton@ni.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>