Standalone support for AOT as dylibs on Fuchsia.

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
diff --git a/runtime/vm/dart_api_impl.cc b/runtime/vm/dart_api_impl.cc
index bd21c6389f0f9939bf4cfea4fc11d21a3cd2b8f7..979f1b88f146478df4c0a95c901c6df12bcb12e6 100644
--- a/runtime/vm/dart_api_impl.cc
+++ b/runtime/vm/dart_api_impl.cc
@@ -6703,6 +6703,9 @@ Dart_CreateAppAOTSnapshotAsBlobs(uint8_t** vm_snapshot_data_buffer,
 #elif !defined(DART_PRECOMPILER)
   return Api::NewError(
       "This VM was built without support for AOT compilation.");
+#elif defined(TARGET_OS_FUCHSIA)
+  return Api::NewError(
+      "AOT as blobs is not supported on Fuchsia; use dylibs instead.");
 #else
   API_TIMELINE_DURATION;
   DARTSCOPE(Thread::Current());