[ACTIVITY] Upstream reviews for LLD. Trying to be more proactive here now that there are fewer maintainers.

[TCWG-1420] Initial investigation into some proposed linker enhancements for embedded systems - Mostly features already implemented in proprietary linkers such as AT and an equivalent to .any. - Completed initial investigation with links to TI/IAR documentation, binutils discussions. - Some thoughts on which of the features might be implemented cleanly enough to be upstreamed.

Pinged llvm-mc subtarget reviews (no response)

Spent some more time investigating a tiny-code model for AArch64 in an attempt to teach myself more about LLVM.