bump product version to 5.4.0.3.0+

Change-Id: I1400fc984d392cf366f8c232165269cd9ef7cc04
diff --git a/configure.ac b/configure.ac
index aae4bac..b1991f1 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],[5.4.0.2.0+],[],[],[http://documentfoundation.org/])
AC_INIT([LibreOffice],[5.4.0.3.0+],[],[],[http://documentfoundation.org/])

AC_PREREQ([2.59])