move all vlib modules to vlib/

vlib/sync/sync_win.v

@@ -0,0 +1,17 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+module sync
+
+struct Mutex {
+}
+
+fn (m Mutex) lock() {
+panic('not implemented') 
+}
+
+fn (m Mutex) unlock() {
+panic('not implemented') 
+}
+