GitHub workflows: Build universal binaries on macOS

Signed-off-by: Christian Blichmann <cblichmann@google.com>

Binary Ninja exporter MVP

Work in progress, this works:
- Logging
- Build address spaces and compute SHA256 of orignal file
- Gather entrypoints similar to IDA version of BinExport
- Write basic BinExport v2 proto with call and flow graphs nodes

Signed-off-by: Christian Blichmann <cblichmann@google.com>
Signed-off-by: Christian Blichmann <mail@blichmann.eu>

Merge pull request google#33 from google/v10-bindiff5

BinExport 10: The version that ships with BinDiff 5

Sync with internal codebase

Initial code drop for open source BinExport.

This is BinExport 9, to be used with the "binexport9" branch of BinNavi:
https://github.com/google/binnavi/tree/binexport9