Clang: Report only diagnostics that can be shown in the editor

Change-Id: I9c258159d240c6ba7eeff34702d8512d9220b3af
Reviewed-by: Marco Bubke <marco.bubke@theqtcompany.com>

src/tools/clangbackend/ipcsource/diagnosticset.h

@@ -38,6 +38,8 @@
 
 #include <QVector>
 
+#include <functional>
+
 namespace ClangBackEnd {
 
 class DiagnosticSetIterator;
@@ -71,6 +73,8 @@ public:
     ConstIterator end() const;
 
     QVector<DiagnosticContainer> toDiagnosticContainers() const;
+    QVector<DiagnosticContainer> toDiagnosticContainers(
+            const Diagnostic::IsAcceptedDiagnostic &isAcceptedDiagnostic) const;
 
 private:
     DiagnosticSet(CXDiagnosticSet cxDiagnosticSet);