MFH: r377546

Add missing checksum for ja-JP-mac language pack

This unbreaks PACKAGE_BUILDING build as used by poudriere and tinderbox.

PR: 196807
Reported by: freebsd-bugzilla@in-addr.com, marino
Differential Revision: https://reviews.freebsd.org/D1566
Approved by: bapt, flo (mentors)
Approved by: portmgr (erwin)