Clang: Process SymbolKind and SymbolTags with the indexer

We add the infrastructure to compute the SymbolKind and SymbolTags in the
indexer. Later we have to add more for templates, virtual functions etc..

Change-Id: I9203c5cfbfffed3065337292010de5fce5736453
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/tools/clangrefactoringbackend/source/clangrefactoringbackend-source.pri

@@ -65,7 +65,6 @@ HEADERS += \
 SOURCES += \
     $$PWD/sourcerangefilter.cpp \
     $$PWD/symbolindexer.cpp \
-    $$PWD/symbolentry.cpp \
     $$PWD/projectpartartefact.cpp \
     $$PWD/filestatuscache.cpp \
     $$PWD/indexdataconsumer.cpp