Facilitate future releases

* use release helper from libosmocore
* use semantic versioning

Change-Id: Ie0a7f5977550bd0a1ba8b03bdb7e2d619a398e4e
Related: OS#1861
diff --git a/configure.ac b/configure.ac
index 3b13469..0a3557d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,6 +12,10 @@
 dnl kernel style compile messages
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
+dnl include release helper
+RELMAKE='-include osmo-release.mk'
+AC_SUBST([RELMAKE])
+
 dnl checks for programs
 AC_PROG_MAKE_SET
 AC_PROG_CC