attached patch corrects a mistake in rev 985, which chmod'd a read-only 
file,
even if it was a symlink from a kernel-tree cloned with lndir.
This resulted in a bad original tree for use in building vanilla kernels.

with patch, script renames the symlink, copies it to the expected name,
and *then* chmods it, and appends to it.   Now vanilla kernel builds also
using same tree re-make w/o actually recompiling anything.