qt5: add workaround for gcc's internal compiler error

Crosscompilation of qdoc causes gcc internal compiler error on
some platforms. Removing the c++11 option from the compilation
prevents this.

Change-Id: I0ad5832859f8c79dba401ecc1d9026559a1ec324
Reviewed-by: aavit <eirik.aavitsland@theqtcompany.com>

recipes-qt/qt5/qtbase/0001-qdoc-workaround-for-gcc-s-ICE.patch

+From 75840ad8b40068b70792a27f1fdc7cccf3d28f7c Mon Sep 17 00:00:00 2001
+From: Samuli Piippo <samuli.piippo@theqtcompany.com>
+Date: Wed, 16 Sep 2015 13:30:38 +0300
+Subject: [PATCH] qdoc: workaround for gcc's ICE
+
+Remove c++11 option from compilation to prevent gcc's internal compiler error:
+in add_stores, at var-tracking.c:6000
+
+Signed-off-by: Samuli Piippo <samuli.piippo@theqtcompany.com>
+---
+ src/tools/qdoc/qdoc.pro | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/tools/qdoc/qdoc.pro b/src/tools/qdoc/qdoc.pro
+index f0df113..a847482 100644
+--- a/src/tools/qdoc/qdoc.pro
++++ b/src/tools/qdoc/qdoc.pro
+@@ -4,6 +4,8 @@
+     requires(!contains(QT_DISABLED_FEATURES, dom))
+ }
+ 
++QMAKE_CXXFLAGS_CXX11 =
++
+ option(host_build)
+ QT = core xml
+ 
+-- 
+1.9.1
+

recipes-qt/qt5/qtbase_%.bbappend

@@ -38,6 +38,7 @@ FILESEXTRAPATHS_append := "${THISDIR}/${PN}:"
 
 SRC_URI += " \
     file://oe-device-extra.pri \
+    file://0001-qdoc-workaround-for-gcc-s-ICE.patch \
     "
 
 do_configure_prepend() {