These JSON files are generated by
sel4-generate-target-specs. You can copy them directly
into your project, but if your project uses a different Rust toolchain than this project, generating
them yourself using that utility will ensure that the resulting target specs are compatible with
your Rust toolchain.
The difference between the *-minimal targets and the non-minimal ones are that the minimal ones
have "has-thread-local": false.
The difference between the *-unwind targets and the non-unwind ones are that the unwind ones have
"panic = "unwind".
The difference between the *-sel4-microkit targets and the *-sel4 ones is that the
*-sel4-microkit targets include a linker script fragment to add the __sel4_ipc_buffer_obj symbol
required by the microkit tool.
Note that options whose values do not deviate from the default are absent in these JSON files.