Update invirt-database to version 0.2.13

Requested by mitchb/root@ATHENA.MIT.EDU

diff --git a/invirt-database b/invirt-database
index 1c4ab89..e4199aa 160000 (submodule)
--- a/invirt-database
+++ b/invirt-database
@@ -1 +1 @@
-Subproject commit 1c4ab89c5b2d54b6fd05817589266f755c4e6935
+Subproject commit e4199aa3b63babad4422275f30bb1e3242cbaadb