Make TerminalController compile on Windows

Author: gmittert

Sources/Basic/TerminalController.swift

@@ -115,7 +115,7 @@ public final class TerminalController {
         // Following code does not compile on ppc64le well. TIOCGWINSZ is
         // defined in system ioctl.h file which needs to be used. This is
         // a temporary arrangement and needs to be fixed.
-#if !arch(powerpc64le)
+#if !(arch(powerpc64le) || os(Windows))
         var ws = winsize()
         if ioctl(1, UInt(TIOCGWINSZ), &ws) == 0 {
             return Int(ws.ws_col)