Guard including unused dlfcn header in COOPERATIVE_GLOBAL_EXECUTOR

Author: kateinoigakukun

stdlib/public/Concurrency/GlobalExecutor.cpp

@@ -60,12 +60,13 @@
 
 #if !SWIFT_CONCURRENCY_COOPERATIVE_GLOBAL_EXECUTOR
 #include <dispatch/dispatch.h>
-#endif
 
 #if !defined(_WIN32)
 #include <dlfcn.h>
 #endif
 
+#endif
+
 using namespace swift;
 
 SWIFT_CC(swift)