Fix depmod intercept. Patch from Andreas Oberritter.
* If depmod -a ${KERNEL_VERSION} is called, the version should be retained.
* The script calls depmod -A, which does nothing if the installed module's
timestamp is older than modules.dep's timestamp. As modules generally
inherit the timestamp of the build, this would result in depmod doing nothing.
git-svn-id: http://opkg.googlecode.com/svn/trunk@599 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358