[roll] Roll fuchsia [security] Make pkg-test explicit about fxblob

With fxblob becoming the default filesystem format, pkg-test needs to
explicitly disable it in the minfs configurations.

Original-Bug: b/282896655
Test: fx test //src/security/tests/pkg_test/tests
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/950135
Original-Revision: 8ccfba4a6e4ec477e3a1ed2b312ab608bdd0e2ca
GitOrigin-RevId: ed8d6eb4cacfcc605d076eb3b4e6302bb2450405
Change-Id: Ic2043ef2e4c1831597266ad132a4169b319d8b34
diff --git a/stem b/stem
index 15ead3f..e653b9c 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="28026e0de7dd38546fa2aff31d0806f0d58cf7ab"/>
+             revision="8ccfba4a6e4ec477e3a1ed2b312ab608bdd0e2ca"/>
   </projects>
   <hooks>
     <hook name="install-environment"