[DebugInfo/PDB] Adding getUndecoratedNameEx and IPDB interfaces for IDiaEnumTables and IDiaTable.

Initial changes to support debugging PE/COFF files with LLDB on Windows through DIA SDK.
There is another set of changes required on the LLDB side before this does anything.

Differential Revision: https://reviews.llvm.org/D39517

llvm-svn: 318403
diff --git a/llvm/unittests/DebugInfo/PDB/PDBApiTest.cpp b/llvm/unittests/DebugInfo/PDB/PDBApiTest.cpp
index 257a887..e998acf 100644
--- a/llvm/unittests/DebugInfo/PDB/PDBApiTest.cpp
+++ b/llvm/unittests/DebugInfo/PDB/PDBApiTest.cpp
@@ -14,6 +14,7 @@
 #include "llvm/DebugInfo/PDB/IPDBRawSymbol.h"
 #include "llvm/DebugInfo/PDB/IPDBSession.h"
 #include "llvm/DebugInfo/PDB/IPDBSourceFile.h"
+#include "llvm/DebugInfo/PDB/IPDBTable.h"
 
 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolAnnotation.h"
@@ -118,6 +119,10 @@
   std::unique_ptr<IPDBEnumDataStreams> getDebugStreams() const override {
     return nullptr;
   }
+
+  std::unique_ptr<IPDBEnumTables> getEnumTables() const override {
+    return nullptr;
+  }
 };
 
 class MockRawSymbol : public IPDBRawSymbol {
@@ -152,6 +157,10 @@
 
   PDB_SymType getSymTag() const override { return Type; }
 
+  std::string getUndecoratedNameEx(PDB_UndnameFlags Flags) const override {
+    return {};
+  }
+
   MOCK_SYMBOL_ACCESSOR(getAccess)
   MOCK_SYMBOL_ACCESSOR(getAddressOffset)
   MOCK_SYMBOL_ACCESSOR(getAddressSection)