(elf32_h8_relax_section) <R_H8_DIR16A8>: Adjust position of relocation.
<R_H8_DIR32A16>: Fix type of relocation.
* ld-h8300/h8300.exp: Replace loop with explicit list. Run relax.d
unconditionally. Run relax-2.d for *-elf targets.
* ld-h8300/relax.d: Fix typo.
* ld-h8300/relax.s: Add 0x prefixes.
* ld-h8300/relad-2.[sd]: New test.