Add supported platforms to multi-platform dir layout distributions.

(cherry picked from commit 0660d36)

Author: ansalond

mx.truffleruby/suite.py

@@ -637,6 +637,12 @@
             "layout": {
                 "META-INF/resources/ruby/ruby-home/<os>/<arch>/": "extracted-dependency:TRUFFLERUBY_GRAALVM_SUPPORT_PLATFORM_SPECIFIC",
             },
+            "platforms": [
+                "linux-amd64",
+                "linux-aarch64",
+                "darwin-amd64",
+                "darwin-aarch64",
+            ],
             "maven": False,
         },