Re-enable Concurrency

This reverts commit 50a7f50.

Author: yonihemi

cmake/caches/Runtime-WASI-wasm32.cmake

@@ -18,7 +18,7 @@ set(SWIFTWASM_DISABLE_REFLECTION_TEST YES CACHE BOOL "")
 # stdlib configurations
 set(SWIFT_BUILD_STATIC_STDLIB YES CACHE BOOL "")
 set(SWIFT_BUILD_DYNAMIC_STDLIB NO CACHE BOOL "")
-set(SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY NO CACHE BOOL "")
+set(SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY YES CACHE BOOL "")
 # TODO(katei): This should get turned off, as this is not an ABI stable platform.
 # But current CMake build system doesn't support SWIFT_STDLIB_STABLE_ABI=NO
 set(SWIFT_STDLIB_STABLE_ABI YES CACHE BOOL "")

utils/webassembly/build-presets.ini

@@ -8,7 +8,7 @@ skip-build-benchmarks
 llvm-targets-to-build=X86;AArch64;WebAssembly
 swift-darwin-supported-archs=%(HOST_ARCHITECTURE)s
 compiler-vendor=swiftwasm
-enable-experimental-concurrency=0
+enable-experimental-concurrency=1
 
 [preset: webassembly-install]