Update arch-inventory files for in-tree builds.

Update arch-inventory files for in-tree builds.

.arch-inventory: Add "libtool" as a preserved file.

src/.arch-inventory: Add ".libs" as a preserved directory.  Put a \
    before the . in .cvsignore to avoid capturing too much.
git-archimport-id: srvx@srvx.net--2006/srvx--devo--1.3--patch-20