circleci: Avoid dashes in package version numbers

This wouldn't trigger on the master branch on account of having the
version trunk.

.circleci/config.yml

@@ -82,7 +82,7 @@ jobs:
                   if grep 'AC_INIT.*trunk.*' ./configure.ac; then
                       sed -i -e "s/AC_INIT(\[\(.*\)\],\s*\[\(.*\)\],\s*\[\(.*\)\])/AC_INIT([\1],[$(date +%Y%m%d)],[\3])/" ./configure.ac
                   else
-                      sed -i -e "s/AC_INIT(\[\(.*\)\],\s*\[\(.*\)\],\s*\[\(.*\)\])/AC_INIT([\1],[\2-$(date +%Y%m%d)],[\3])/" ./configure.ac
+                      sed -i -e "s/AC_INIT(\[\(.*\)\],\s*\[\(.*\)\],\s*\[\(.*\)\])/AC_INIT([\1],[\2.$(date +%Y%m%d)],[\3])/" ./configure.ac
                   fi
                   ./autogen.des
                   make dist -j 16