Windows: add some defines from WinUser.h

Add the windows message queue status flags macros.  This should allow
the use of the macros when writing Windows code.

Author: compnerd

stdlib/public/Windows/WinSDK.swift

@@ -77,6 +77,20 @@ public var FIONBIO: Int32 {
 public var CW_USEDEFAULT: Int32 {
   Int32(bitPattern: 2147483648)
 }
+
+public var QS_MOUSE: UINT {
+  UINT(QS_MOUSEMOVE | QS_MOUSEBUTTON)
+}
+public var QS_INPUT: UINT {
+  QS_MOUSE | UINT(QS_KEY | QS_RAWINPUT | QS_TOUCH | QS_POINTER)
+}
+public var QS_ALLEVENTS: UINT {
+  QS_INPUT | UINT(QS_POSTMESSAGE | QS_TIMER | QS_PAINT | QS_HOTKEY)
+}
+public var QS_ALLINPUT: UINT {
+  QS_INPUT | UINT(QS_POSTMESSAGE | QS_TIMER | QS_PAINT | QS_HOTKEY | QS_SENDMESSAGE)
+}
+
 public var WS_OVERLAPPEDWINDOW: UINT {
   UINT(WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX)
 }