Install sample cfg file to /etc/osmocom

Change-Id: I6926e989a130086f4b6c8277407377a4063f452f
diff --git a/doc/examples/Makefile.am b/doc/examples/Makefile.am
index 530c3fa..da504f4 100644
--- a/doc/examples/Makefile.am
+++ b/doc/examples/Makefile.am
@@ -1,3 +1,11 @@
+OSMOCONF_FILES = \
+	osmo-mgw/osmo-mgw.cfg
+
+osmoconfdir = $(sysconfdir)/osmocom
+osmoconf_DATA = $(OSMOCONF_FILES)
+
+EXTRA_DIST = $(OSMOCONF_FILES)
+
 CFG_FILES = find $(srcdir) -name '*.cfg*' | sed -e 's,^$(srcdir),,'
 
 dist-hook: