uml: work-around console issue with procd

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38164 3c298f89-4303-0410-b956-a3cf2f4a3e73
uml: fix some kernel compilation issues with GCC

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38165 3c298f89-4303-0410-b956-a3cf2f4a3e73
uml: work around mangled parameter handling for ubd

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38166 3c298f89-4303-0410-b956-a3cf2f4a3e73