MFH: r492045

japanese/mh: Fix man pages, runtime error

• man pages breakage on FreeBSD 11.x and later
• runtime error due to lld 6.0 issue, fixed by using lld 7.0

PR: 233463, 235456
Submitted by: WATANABE Kazuhiro <CQG00620@nifty.ne.jp> (maintainer), nyan
Approved by: portmgr (unbreak blanket)