base-files: provide a mechanism to skip creation of the hostname file

base-files: provide a mechanism to skip creation of the hostname file

The existence of a /etc/hostname file causes any hostname provided on
the kernel command line or via dhcp to be overwritten by the
initscripts 'init.d/hostname.sh'. This change allows you to set a
value of "" for 'hostname' which will skip the creation of the
/etc/hostname file by the base-files package.

(From OE-Core rev: 5fd3503d4a438d126f44fe8118e9ea465e7699c2)

Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>