Add explicit dependency on the syslog shard (#167210)

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Update routing in Flutter to prepare for the removal of the LogSink
shard from RealmBuilder.

https://fxbug.dev/404543928


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diff --git a/engine/src/flutter/shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/meta/dart-jit-runner-integration-test.cml b/engine/src/flutter/shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/meta/dart-jit-runner-integration-test.cml
index 4564ab7..8053d60 100644
--- a/engine/src/flutter/shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/meta/dart-jit-runner-integration-test.cml
+++ b/engine/src/flutter/shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/meta/dart-jit-runner-integration-test.cml
@@ -10,6 +10,7 @@
         // This test needs both the vulkan facet and the hermetic-tier-2 facet,
         // so we are forced to make it a system test.
         "sys/testing/system-test.shard.cml",
+        "syslog/client.shard.cml",
     ],
     program: {
         binary: "bin/app",