File fix-build-isystem.patch of Package libqt5-creator

From: Fabian Vogt <fvogt@suse.com>
Subject: Fix build by not appending -isystem /usr/include
References: QTCREATORBUG-18848

-isystem /usr/include breaks gcc-6.0+ (RESOLVED WONTFIX) so work around that
by not using it. llvm is installed in /usr/include anyway here.

Index: qt-creator-opensource-src-4.4.0/src/tools/clangbackend/clangbackend.pro
===================================================================
--- qt-creator-opensource-src-4.4.0.orig/src/tools/clangbackend/clangbackend.pro
+++ qt-creator-opensource-src-4.4.0/src/tools/clangbackend/clangbackend.pro
@@ -10,7 +10,6 @@ QT += core network
 QT -= gui
 
 LIBS += $$LIBCLANG_LIBS
-INCLUDEPATH += $$LLVM_INCLUDEPATH
 
 SOURCES += clangbackendmain.cpp