fix(rpm): tag vm.args as config (#67)

diff --git a/rpm/SPECS/couchdb.spec.in b/rpm/SPECS/couchdb.spec.in
index e57da78..01314d5 100644
--- a/rpm/SPECS/couchdb.spec.in
+++ b/rpm/SPECS/couchdb.spec.in
@@ -177,6 +177,7 @@
 %endif
 %attr(0755, %{name}, %{name}) %dir /var/log/%{name}
 %config(noreplace) /opt/couchdb/etc/local.ini
+%config(noreplace) /opt/couchdb/etc/vm.args
 %config /etc/logrotate.d/%{name}
 %if 0%{?fedora} || 0%{?rhel} >= 7 || 0%{?suse_version}
 %{_unitdir}/%{name}.service