[roll] Roll fuchsia [tefmocheck] Add tefmo for sys_config read failure

This indicates that we likely won't be booting from the intended slot
and may fall back to booting from the R slot instead (if that's still
readable).  Since booting the wrong code makes it rather hard to
understand issues, flag this earlier.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/726074
Original-Revision: 9b015003aacd1ded7a0e3fb94eaba2c6005834c4
GitOrigin-RevId: 11adc3042f3d0384112012bf5c1d9540d3ec1e65
Change-Id: I1b29d9b81d7e5ca19a62f0c9951881fb7d363b38
diff --git a/stem b/stem
index c51d11c..7600cdf 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="57d754317bcc8284e8f83cf067a3c4b1fef61bb0"/>
+             revision="9b015003aacd1ded7a0e3fb94eaba2c6005834c4"/>
   </projects>
   <hooks>
     <hook name="install-environment"