Update xvm-prodconfig to version 1.1.35

Requested by quentin/root@ATHENA.MIT.EDU

diff --git a/xvm-prodconfig b/xvm-prodconfig
index e014dd3..3f39702 160000 (submodule)
--- a/xvm-prodconfig
+++ b/xvm-prodconfig
@@ -1 +1 @@
-Subproject commit e014dd304162fd6bec0f331e50accfea68c230d2
+Subproject commit 3f39702d3528794b1ad6dcac8021d19eda751f4e