Add support for loading dynamic contracts

[jackcmay]

This issue tracks the incremental steps needed to support loading dynamic contracts in Pillbox. Future enhancements are tracked by #1564

Design of dynamic contracts is being tracked by a couple of different issues (#943, #940, #1133)

Native refers to loading platform modules (e.g. MacOs uses x86-64 Mach-0 modules). These modules are loaded from files on the machine running Solana. Their intent is for proof of concept and potentially longer-term testing of dynamic contracts. Long-term dynamic contracts will use Berkeley Packet Filter (BPF) based modules which allows them to be run on a virtual machine and are more easily validated that they are constrained and deterministic.

• [x] Add dynamic contracts to the bank
• [x] Add example native dynamic contracts and corresponding workspace changes
• [x] Add support for generating transactions to dynamic contracts
• [x] Fix clippy and general cleanup of BPF loader/jitter
• [x] Mainline rBPF changes to the parent repository
• [x] Add support for generating BPF modules to build system
• [x] Add BPF module loading support to dynamic contracts
• [x] Integrate dynamic programs with the bank

[jackcmay]

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[mvines]

Mainline rBPF changes to the parent repository

@jackcmay this is done right? And if so, this issue is too?

[jackcmay]

All of the changes we need have been mainlined as of this week (no panics, customizable verifier, etc...). Waiting for the rbpf crate owner to push a new version so we can switch back to crates.io. He has given us confirmation that it will be done by the end of the month and he has been actively involved in code review, etc... so I don't have any reason to doubt it will be done. Waiting on an exact date he expects that to happen. Once pushed and we switch over to crates.io I plan to close this issue.

[jackcmay]

Woot, rbp 0.1.0 released

1605