[wasm] Enable Distributed module build for Wasm target

Author: kateinoigakukun

utils/swift_build_support/swift_build_support/products/wasmstdlib.py

@@ -101,6 +101,7 @@ def _build(self, host_target, target_triple):
         self.cmake_options.define(
             'SWIFT_STDLIB_COMPACT_ABSOLUTE_FUNCTION_POINTER:BOOL', 'TRUE')
         self.cmake_options.define('SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY:BOOL', 'TRUE')
+        self.cmake_options.define('SWIFT_ENABLE_EXPERIMENTAL_DISTRIBUTED:BOOL', 'TRUE')
         self.cmake_options.define(
             'SWIFT_ENABLE_EXPERIMENTAL_STRING_PROCESSING:BOOL', 'TRUE')
         self.cmake_options.define('SWIFT_PATH_TO_STRING_PROCESSING_SOURCE:PATH',