Fix build without NLS, adding %%NLS%% to pkg-plist.

Broken since r433466, update to 1.43.4, which added .mo files to
pkg-plist but forgot to add the %%NLS%% prefixes.

PR: 217378
Submitted by: Andrew Romanenko
Reported by: Andrew Romanenko
MFH: 2017Q1
Pointyhat: Matthias Andree