Merge pull request #37027 from 3405691582/ImportConcurrencyEmplicitlyIfEnabled

Author: swift-ci

lib/Frontend/Frontend.cpp

@@ -761,6 +761,10 @@ static bool shouldImportConcurrencyByDefault(const llvm::Triple &target) {
     return true;
   if (target.isOSLinux())
     return true;
+#if SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY
+  if (target.isOSOpenBSD())
+    return true;
+#endif
   return false;
 }