qtwinextras: replace patch with qmake argument

src/qtwinextras-1.patch

@@ -1,27 +0,0 @@
-This file is part of MXE. See LICENSE.md for licensing information.
-
-From 9aad92fdf482f1a38360559586db9ee2df5d9fc4 Mon Sep 17 00:00:00 2001
-From: Mark Brand <mabrand@mabrand.nl>
-Date: Sun, 29 Jan 2017 20:27:29 +0100
-Subject: [PATCH] build fix for MXE
-
-Needed for the shared build. In the static build, gdi32 is probably brought in as a transitive dependency.
-
-Change-Id: Ic0b1ab49cfb04559823c7446bda197b34ea15f54
-
-diff --git a/src/winextras/winextras.pro b/src/winextras/winextras.pro
-index 5d93c6b..4c423b0 100644
---- a/src/winextras/winextras.pro
-+++ b/src/winextras/winextras.pro
-@@ -45,7 +45,7 @@ HEADERS += \
- 
- QMAKE_DOCS = $$PWD/doc/qtwinextras.qdocconf
- 
--LIBS_PRIVATE += -lole32 -lshlwapi -lshell32 -ldwmapi
-+LIBS_PRIVATE += -lole32 -lshlwapi -lshell32 -ldwmapi -lgdi32
- win32:!qtHaveModule(opengl)|qtConfig(dynamicgl):LIBS_PRIVATE += -lgdi32
- 
- OTHER_FILES += \
--- 
-2.9.3
-

src/qtwinextras.mk

@@ -16,7 +16,9 @@ define $(PKG)_UPDATE
 endef
 
 define $(PKG)_BUILD
-    cd '$(1)' && '$(PREFIX)/$(TARGET)/qt5/bin/qmake'
+    cd '$(1)' && '$(PREFIX)/$(TARGET)/qt5/bin/qmake' \
+        -after \
+	'LIBS_PRIVATE += -lgdi32'
     $(MAKE) -C '$(1)' -j '$(JOBS)'
     $(MAKE) -C '$(1)' -j 1 install
 endef