Use release helper from libosmocore

Change-Id: I06b9ceff1e1ecfccc1b1a52ffe6b9d3f6dcaa34d
Related: OS#1861

Makefile.am

@@ -10,6 +10,8 @@ EXTRA_DIST = \
 	.version \
 	$(NULL)
 
+@RELMAKE@
+
 BUILT_SOURCES = $(top_srcdir)/.version
 $(top_srcdir)/.version:
 	echo $(VERSION) > $@-t && mv $@-t $@

configure.ac

@@ -15,6 +15,10 @@ AC_CONFIG_TESTDIR(tests)
 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_MKDIR_P