MFH: r424299

devel/jsoncpp: Fix bad REINPLACE_CMD of jsoncpp.pc

• Remove extra ${PREFIX} in jsoncpp/Makefile

% pkgconf --libs --cflags jsoncpp
-I/usr/localusr/local/include/jsoncpp -L/usr/localusr/local/lib -ljsoncpp

Notice the extra /usr/local.

PR: 213553
Reported by: John Hein <z7dr6ut7gs@snkmail.com>
Approved by: yuri@rawbw.com (maintainer), koobs (mentor)

Approved by: ports-secteam (feld)