Roll Fuchsia Mac SDK from HONostNiI... to kcEF0MZNb... (#30921)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/fuchsia-mac-sdk-flutter-engine
Please CC aaclarke@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
https://dart.googlesource.com/external/github.com/flutter/engine/+/d4bcb373a50fa537e396e7e68230cb7b2694069b
diff --git a/commits.json b/commits.json
index 7d8974a..96bbd92 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
-  "external/github.com/flutter/engine":"cfc25173243c2ed3f3168b0e6d9f3d98830933a1",
+  "external/github.com/flutter/engine":"d4bcb373a50fa537e396e7e68230cb7b2694069b",
   "external/github.com/flutter/flutter":"6477d3ee28906a989b97661eff479bbb033bb6ce",
   "sdk":"a03eb19a61dc9a60bb82bf5b23490e7bdab934a3"
 }
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