Keyguard: Reduce font size of clock in status keyguard (sw720dp) (portrait)

Add Portrait mode to:
http://review.cyanogenmod.org/#/c/31086

Patchset 2: Updated copyright
            Rebased

Change-Id: I9466a0c643d0c74ded37fe12b615dde6c014c901
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>