Add platforms to generated isolate library layout distributions.

(cherry picked from commit fcd8b7104fe8f1580285b04e52f871b390aa1968)
(cherry picked from commit 38e3fb9)

Author: ansalond

graal-js/mx.graal-js/mx_graal_js.py

@@ -446,7 +446,16 @@ def mx_register_dynamic_suite_constituents(register_project, register_distributi
                 '-H:ReservedAuxiliaryImageBytes=2145482548',
             ] if not mx.is_windows() else [],
             language='js',
-            isolate_library_layout_distribution='JS_ISOLATE_LAYOUT'
+            isolate_library_layout_distribution={
+                'name': 'JS_ISOLATE_LAYOUT',
+                'platforms': [
+                    'linux-amd64',
+                    'linux-aarch64',
+                    'darwin-amd64',
+                    'darwin-aarch64',
+                    'windows-amd64',
+                ],
+            },
         )
     ],
     boot_jars=[],