Add compatibility with older cmdline setup on console argument

Older systems featured full path to tty inside console=. This
is no longer valid and causes issues with fbcondecor. The new
expected format of console= is tty name with the directory part
stripped off: console=tty1 for example.
This patch has been in sabayon's genkernel for <2 years, but
should be tested out on non-standard environments.

defaults/linuxrc

@@ -135,6 +135,7 @@ do
 		# Redirect output to a specific tty
 		CONSOLE\=*|console\=*)
 			CONSOLE=`parse_opt "${x}"`
+			CONSOLE=`basename ${CONSOLE}`
 #			exec >${CONSOLE} <${CONSOLE} 2>&1
 		;;
 		# /dev/md