Update xvm-prodconfig to version 1.1.42

Requested by mitchb/root@ATHENA.MIT.EDU

diff --git a/xvm-prodconfig b/xvm-prodconfig
index 9cf0d05..e0a939d 160000 (submodule)
--- a/xvm-prodconfig
+++ b/xvm-prodconfig
@@ -1 +1 @@
-Subproject commit 9cf0d05a285aeb2b04a2aefb821c9bbb9c63501a
+Subproject commit e0a939d1d33ec8129e31022241adef49e084fbb8