[DebugInfoPDB] Add a few missing definitions to PDBTypes.h

The missing definitions are from cvconst.h shipped with DIA SDK.

Correct the url to MSDN for MemoryTypeEnum and set the underlying 
type of PDB_StackFrameType and PDB_MemoryType to uint16_t.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329104 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed