add supports of the latest version of hermit-entry

Merge hermit-os#436

436: Release 0.2.1 r=mkroening a=mkroening

Closes hermit-os#435.

Co-authored-by: Martin Kröning <[email protected]>

Merge hermit-os#388

388: Release version 0.2.0 r=mkroening a=mkroening



Co-authored-by: Martin Kröning <[email protected]>

Merge hermit-os#372

372: Release version 0.1.3 r=mkroening a=mkroening



Co-authored-by: Martin Kröning <[email protected]>

Merge hermit-os#362

362: Release version 0.1.2 r=mkroening a=mkroening



Co-authored-by: Martin Kröning <[email protected]>

Merge hermit-os#355

355: Release version 0.1.1 r=mkroening a=mkroening



Co-authored-by: Martin Kröning <[email protected]>

Merge hermit-os#350

350: README.md: Prepare for new release r=mkroening a=mkroening



Co-authored-by: Martin Kröning <[email protected]>

Implement GDB server using gdbstub

- switch to gdbstub as crate for GDB Remote Serial Protocol

using the latest KVM bindings

- Bump kvm-bindings from 0.3.0 to 0.4.0 hermit-os#101
- fix bug in the evaluation of cpuid entries
- Bump goblin from 0.3.4 to 0.4.0 hermit-os#100
- Bump byteorder from 1.4.2 to 1.4.3 hermit-os#93

using atexit to store the log file