Notes:
* SH opcodes array, file libr/asm/arch/sh/gnu/sh-dis.c from GNU binutils, defines "bf.s" and "bf/s", same with "bt.s" and "bt/s".
* Both pairs are identical, e.g. bt.s and bt/s mean the same thing.
* As *.s variants come first in the table, radare and binutils-objdump print bf.s and bt.s names.
* Still true for latest binutils (v2.32 2019-02-02).
* Renesas chip hardware manuals and IDA Pro only use bf/s and bt/s.
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