osmo-hlr: Fix do_compile if hlr.db is already populated

If compile is rerun on a workdir with hlr.db already populated, sqlite
will fail announcing some tables already exist.

Change-Id: I244df1ff4554708a5f619b288a097eb0a672e660
diff --git a/recipes-osmocom/osmo-hlr/osmo-hlr.inc b/recipes-osmocom/osmo-hlr/osmo-hlr.inc
index 7e75d13..6d8b748 100644
--- a/recipes-osmocom/osmo-hlr/osmo-hlr.inc
+++ b/recipes-osmocom/osmo-hlr/osmo-hlr.inc
@@ -10,6 +10,7 @@
 inherit autotools pkgconfig systemd
 
 do_compile_append() {
+	rm -f ${WORKDIR}/hlr.db
 	sqlite3 ${WORKDIR}/hlr.db < ${S}/sql/hlr.sql
 }