elfedit: Align --[in|out]put-abiversion usage
Align
--input-abiversion [0-255] Set input ABIVERSION
--output-abiversion [0-255] Set output ABIVERSION
instead of
--input-abiversion [0-255]
Set input ABIVERSION
--output-abiversion [0-255]
Set output ABIVERSION
* elfedit.c (usage): Align --[in|out]put-abiversion usage.