Since this code was last reviewed, more relaxations have been added to
the psABI for existing standard relocations that LLVM didn't have marked
as relaxable.
This change ensures that LLVM marks the following relocations (and their
respective fixups) as relaxable:
- `R_RISCV_JAL`
- `R_RISCV_GOT_HI20`
- `R_RISCV_TPREL_HI20`
- `R_RISCV_TLSDESC_HI20`
This also updates the linker relaxation test to use `-NEXT` to check all
the output lines.
There are lots more emitted relocations, not only due to JAL being
relaxable, but branches are now also marked linker relaxable because
they can be turned into `b<cc>; jal` during assembly relaxation, which
may also be marked relaxable.
4e3699b4c6