This moves exe symbol-specific method implementations out of NativeRawSymbol
into a concrete subclass. Also adds implementations for hasCTypes and
hasPrivateSymbols and a simple test to ensure the native reader can access
the summary information for the executable from the PDB.
Differential Revision: https://reviews.llvm.org/D31059
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298005 91177308-0d34-0410-b5e6-96231b3b80d8