netbase: Swapping hostname and ip in the /etc/hosts file.

Swapping the hostname and ip in the /etc/hosts file, appended
in this bbappend file.

JIRA: SB-3004

Signed-off-by: Sujith H <Sujith_Haridasan@mentor.com>
Merge pull request #258 from sharidas/netbase-properfix

netbase: Swapping hostname and ip in the /etc/hosts file.