Add a temporary target to help with the migration to gn artifacts. (flutter#34049)

Author: godofredoc

ci/builders/linux_android_debug_engine.json

@@ -87,7 +87,7 @@
                     "include_paths": [
                         "out/android_debug/zip_archives/android-arm/symbols.zip",
                         "out/android_debug/zip_archives/flutter_download_io",
-                        "out/android_debug/zip_archives/android-arm/sky_engine.zip",
+                        "out/android_debug/zip_archives/sky_engine.zip",
                         "out/android_debug/zip_archives/android-javadoc.zip"
                     ]
                 }
@@ -106,7 +106,7 @@
                 "config": "android_debug",
                 "targets": [
                     "flutter",
-                    "flutter/sky/dist:zip",
+                    "flutter/sky/dist:zip_old_location",
                     "flutter/shell/platform/android:embedding_jars",
                     "flutter/shell/platform/android:abi_jars",
                     "flutter/shell/platform/android:robolectric_tests"

sky/dist/BUILD.gn

@@ -37,6 +37,19 @@ if (is_android) {
     ]
     deps = [ ":sky_engine" ]
   }
+
+  zip_bundle("zip_old_location") {
+    # TODO godofredoc: remove after we migrate the tool to use the new location.
+    # Bug: https://github.com/flutter/flutter/issues/105351
+    output = "sky_engine.zip"
+    files = [
+      {
+        source = "$root_build_dir/dist/packages/sky_engine"
+        destination = "sky_engine"
+      },
+    ]
+    deps = [ ":sky_engine" ]
+  }
 }
 
 group("dist") {