Correct ChangeLog entry for commit b8426d169d3f8a

commit b8426d169d3f8ab820f3bdaf45fbc64f8bb827ed
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Fri Sep 21 04:24:40 2018 -0700

    gas: Make bfin-parse.c/rl78-parse.c/rx-parse.c depend on bfd/reloc.c

It is for PR gas/23691, not PR gas/23692.
1 file changed