Install sample cfg file to /etc/osmocom

Change-Id: I7476a1db470d3bc3a833e7657ad29f266df51667
diff --git a/doc/examples/Makefile.am b/doc/examples/Makefile.am
index 8f14fdc..7441d48 100644
--- a/doc/examples/Makefile.am
+++ b/doc/examples/Makefile.am
@@ -1,3 +1,7 @@
+osmoconfdir = $(sysconfdir)/osmocom
+osmoconf_DATA = osmo-hnbgw.cfg
+
+EXTRA_DIST = osmo-hnbgw.cfg
 
 CFG_FILES = find $(srcdir) -name '*.cfg*' | sed -e 's,^$(srcdir),,'