Avoid including headers that are not needed in Random.cpp for __APPLE__ (#41340)

Author: kubamracek

stdlib/public/stubs/Random.cpp

@@ -23,9 +23,9 @@
 #include <Bcrypt.h>
 #pragma comment(lib, "bcrypt.lib")
 #elif !defined(__APPLE__)
+
 #include <errno.h>
 #include <fcntl.h>
-#endif
 
 #if __has_include(<sys/random.h>)
 #include <sys/random.h>
@@ -37,6 +37,8 @@
 #include <sys/syscall.h>
 #endif
 
+#endif
+
 #include <stdlib.h>
 
 #include "swift/Runtime/Debug.h"