Merge pull request #37167 from apple/locals-windows-fix

[TaskLocals] Windows: fix missing io.h

Author: ktoso

stdlib/public/Concurrency/TaskLocal.cpp

@@ -26,6 +26,10 @@
 #include <android/log.h>
 #endif
 
+#if defined(_WIN32)
+#include <io.h>
+#endif
+
 using namespace swift;
 
 // =============================================================================