Only specify --no-link-platform when not specifying --aot, roll dart-lang sdk (#13742)

* Only specify --no-link-platform when --aot isn't specified

* [dart_roll] Update to e68ca9b652acdb642668a6acb5f630d5be6c03da

DEPS

@@ -34,7 +34,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '4b9638aaa17203b4e4f9ceb8492faf6a11301999',
+  'dart_revision': 'e68ca9b652acdb642668a6acb5f630d5be6c03da',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

ci/licenses_golden/licenses_third_party

-Signature: cb6a78a49c674537ebcffa756ccdea6b
+Signature: d45bc36638d83a8d56574a59410d78d8
 
 UNUSED LICENSES:
 

tools/fuchsia/dart_kernel.gni

@@ -49,7 +49,6 @@ template("dart_kernel") {
       "--packages=" + rebase_path(dot_packages),
       "--target=dart_runner",
       "--platform=" + rebase_path(platform_dill),
-      "--no-link-platform",
       "--output=" + rebase_path(output),
     ]
 
@@ -64,6 +63,9 @@ template("dart_kernel") {
         "--aot",
         "--tfa",
       ]
+    } else {
+      # --no-link-platform is only valid when --aot isn't specified
+      args += [ "--no-link-platform" ]
     }
 
     if (defined(invoker.product) && invoker.product) {