Windows Debug Information for local variables.

[stooke]

TL;DR

Add new Codeview symbol record definitions to Windows debug info support for PE/COFF executables. Basic support to define function parameters (only valid at function entry) will be added.

Goals

Windows debugger support now includes line numbers and type information. Static variables are accessible, but local variables and function parameters are not, unless the user casts a register to a type in the debugger.

I would like to add local variable information to Graal, based on the Dwarf support implemented by @adinn and the type info support #3732 that was just integrated. I propose a two-stage process: in the first pull request, I would add the new CodeView records required to implement this support, and simple code to define function parameters upon function entry.
A second pull request would add full local variable support.

Non-Goals

• full stack frame-aware local variable definitions (that is for a later PR).
• isolate support would be implemented separately.