$NetBSD: patch-ae,v 1.5 2015/03/29 15:28:43 rodent Exp $

Use libtool.

--- doc/doc.pro.orig	2012-03-23 06:10:54.000000000 +0000
+++ doc/doc.pro
@@ -17,6 +17,7 @@ win32 {
   QMAKE_RUN_CC  = @echo > /dev/null
   QMAKE_RUN_CXX = @echo > /dev/null
   QMAKE_LINK    = @echo > /dev/null
+  QMAKE_LIBTOOL = @echo > /dev/null
 }
 
 TARGET      = doc