Contribs, Qt: work-around compiler crash on Mingw/32

contrib/src/qt/0001-disable-qt_random_cpu.patch

+--- qt-5.11.0/src/corelib/global/qrandom.cpp.orig	2018-06-19 11:22:03.011543136 +0200
++++ qt-5.11.0/src/corelib/global/qrandom.cpp	2018-06-19 11:23:45.231337043 +0200
+@@ -90,7 +90,7 @@
+ 
+ QT_BEGIN_NAMESPACE
+ 
+-#if defined(Q_PROCESSOR_X86) && QT_COMPILER_SUPPORTS_HERE(RDRND)
++#if 0
+ static qsizetype qt_random_cpu(void *buffer, qsizetype count) Q_DECL_NOTHROW;
+ 
+ #  ifdef Q_PROCESSOR_X86_64

contrib/src/qt/rules.mak

@@ -22,8 +22,13 @@ $(TARBALLS)/qt-$(QT_VERSION).tar.xz:
 qt: qt-$(QT_VERSION).tar.xz .sum-qt
 	$(UNPACK)
 	mv qtbase-everywhere-src-$(QT_VERSION) qt-$(QT_VERSION)
+ifdef HAVE_WIN32
 	$(APPLY) $(SRC)/qt/0001-Windows-QPA-prefer-lower-value-when-rounding-fractio.patch
 	$(APPLY) $(SRC)/qt/0002-Windows-QPA-Disable-systray-notification-sounds.patch
+ifndef HAVE_WIN64
+	$(APPLY) $(SRC)/qt/0001-disable-qt_random_cpu.patch
+endif
+endif
 	$(MOVE)
 
 ifdef HAVE_MACOSX