Disable concurrency in build-presets.ini

Author: MaxDesiatov

utils/webassembly/build-presets.ini

@@ -9,6 +9,7 @@ skip-build-benchmarks
 llvm-targets-to-build=X86;AArch64;WebAssembly
 swift-darwin-supported-archs=x86_64
 compiler-vendor=swiftwasm
+enable-experimental-concurrency=0
 
 [preset: webassembly-install]
 
@@ -132,4 +133,4 @@ mixin-preset=
 [preset: webassembly-macos-target-install]
 mixin-preset=
     webassembly-target-install
-    webassembly-macos-target
+    webassembly-macos-target