bump product version to 7.4.3.0.0+

Change-Id: Ida0b4ae6cd87b84a7abfb558e515f49f7107745f
diff --git a/configure.ac b/configure.ac
index 8404c9f..b9f6d5f 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],[7.4.2.0.0+],[],[],[http://documentfoundation.org/])
AC_INIT([LibreOffice],[7.4.3.0.0+],[],[],[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