uml: work-around console issue with procd

SVN-Revision: 38164

target/linux/uml/base-files/etc/inittab

@@ -0,0 +1,4 @@
+::sysinit:/etc/init.d/rcS S boot
+::shutdown:/etc/init.d/rcS K shutdown
+::askconsole:/bin/ash --login
+::respawn:/sbin/askfirst /dev/console /bin/ash --login