profileevaluator: do not add sysroot if the result does not exist

Required for Qt paths in includes on ios.

Task-number: QTCREATORBUG-11908
Change-Id: Ic56c81812d13e3d6f6acb31d59c1ff7c7048aeff
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/shared/proparser/profileevaluator.cpp

@@ -100,7 +100,8 @@ QString ProFileEvaluator::sysrootify(const QString &path, const QString &baseDir
 #endif
     const bool isHostSystemPath =
         option->sysroot.isEmpty() || path.startsWith(option->sysroot, cs)
-        || path.startsWith(baseDir, cs) || path.startsWith(d->m_outputDir, cs);
+        || path.startsWith(baseDir, cs) || path.startsWith(d->m_outputDir, cs)
+        || !QFileInfo(option->sysroot + path).exists();
 
     return isHostSystemPath ? path : option->sysroot + path;
 }