ClangTools: Add tool that runs clang-tidy and clazy

... over the whole project.
Generate and read serialized files to get diagnostics.

Change-Id: Iafc25fc70443107a040a995efc038aed35102bbf
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/clangtools/clangtool.h

@@ -47,6 +47,7 @@ public:
     virtual void startTool() = 0;
 
     virtual QList<Diagnostic> read(const QString &filePath,
+                                   const QString &logFilePath,
                                    QString *errorMessage) const = 0;
 
     // For testing.