configure.ac: fix up Debian naming scheme for its orig.tar.gz file

configure.ac: fix up Debian naming scheme for its orig.tar.gz file

We are using a new convention for the 1.43-WIP releases which should
be less confusion by replacing the hyphens by periods (e.g.,
1.43~WIP.2016.03.06 instead of 1.43~WIP-2016-03-06).  This avoids
confusion regarding the debian release number (which uses the last
hyphen in the version string to separate the upstream version from the
release number).

Also fix a typo in the version number used in the debian changelog and
e2fslibs.symbols file.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>