bump product version to 7.0.3.1.0+

Change-Id: Ife468ae1a211f8901166555b61a163ade1e330ce
diff --git a/configure.ac b/configure.ac
index 0e93232..7fcf4f4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,7 +9,7 @@ dnl in order to create a configure script.
# several non-alphanumeric characters, those are split off and used only for the
# ABOUTBOXPRODUCTVERSIONSUFFIX in openoffice.lst. Why that is necessary, no idea.

AC_INIT([LibreOffice],[7.0.3.0.0+],[],[],[http://documentfoundation.org/])
AC_INIT([LibreOffice],[7.0.3.1.0+],[],[],[http://documentfoundation.org/])

dnl libnumbertext needs autoconf 2.68, but that can pick up autoconf268 just fine if it is installed
dnl whereas aclocal (as run by autogen.sh) insists on using autoconf and fails hard