Added more COFF machine constants.

[ExPixel]

Added all of the COFF machine constants found here:
https://docs.microsoft.com/en-us/windows/win32/debug/pe-format

(sorry about the multiple pull requests)

[m4b]

Cool! Thanks for the PR :) @ExPixel, just curious where did you get the constants from?; @jan-auer you know a bit about PE, do these look ok to you?

[ExPixel]

The constants can be found here: https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#machine-types . Seems to match up with what you already had for x86 and x86_64.

[m4b]

Awesome, appreciate the PR :)

[m4b]

ok this along with unwrap is in 0.2.3 on crates.io, thanks for the PRs :)

[jan-auer]

FWIW, we also have the MachineType enum in pdb. If there are more cases like this, we could create a minimal pe crate that exposes these to both goblin and pdb. I'll keep an eye out for this.