Bug 1217971 - Add explicit lang file directive
Bug 1217971 - Add explicit lang file directive

This lets us override strings coming from new.lang (loaded in
base-resp.html). Thanks to Pascal for the idea.

flodolo/bedrock,sylvestre/bedrock,mozilla/bedrock,alexgibson/bedrock,kyoshino/bedrock,pascalchevrel/bedrock,Sancus/bedrock,davehunt/bedrock,glogiotatidis/bedrock,gerv/bedrock,glogiotatidis/bedrock,ericawright/bedrock,schalkneethling/bedrock,jgmize/bedrock,CSCI-462-01-2017/bedrock,TheoChevalier/bedrock,schalkneethling/bedrock,flodolo/bedrock,Sancus/bedrock,ericawright/bedrock,hoosteeno/bedrock,craigcook/bedrock,CSCI-462-01-2017/bedrock,MichaelKohler/bedrock,TheJJ100100/bedrock,pascalchevrel/bedrock,CSCI-462-01-2017/bedrock,gauthierm/bedrock,jpetto/bedrock,davehunt/bedrock,craigcook/bedrock,mozilla/bedrock,flodolo/bedrock,davehunt/bedrock,sgarrity/bedrock,TheoChevalier/bedrock,gerv/bedrock,mkmelin/bedrock,sylvestre/bedrock,MichaelKohler/bedrock,pascalchevrel/bedrock,analytics-pros/mozilla-bedrock,kyoshino/bedrock,gauthierm/bedrock,MichaelKohler/bedrock,sylvestre/bedrock,kyoshino/bedrock,Sancus/bedrock,sgarrity/bedrock,Sancus/bedrock,jgmize/bedrock,gauthierm/bedrock,jgmize/bedrock,craigcook/bedrock,hoosteeno/bedrock,MichaelKohler/bedrock,mozilla/bedrock,hoosteeno/bedrock,analytics-pros/mozilla-bedrock,schalkneethling/bedrock,mkmelin/bedrock,schalkneethling/bedrock,analytics-pros/mozilla-bedrock,pascalchevrel/bedrock,TheoChevalier/bedrock,jpetto/bedrock,TheJJ100100/bedrock,mozilla/bedrock,TheoChevalier/bedrock,jpetto/bedrock,gauthierm/bedrock,alexgibson/bedrock,mkmelin/bedrock,ericawright/bedrock,alexgibson/bedrock,sgarrity/bedrock,sylvestre/bedrock,hoosteeno/bedrock,jgmize/bedrock,gerv/bedrock,davehunt/bedrock,TheJJ100100/bedrock,gerv/bedrock,mkmelin/bedrock,alexgibson/bedrock,TheJJ100100/bedrock,glogiotatidis/bedrock,jpetto/bedrock,craigcook/bedrock,CSCI-462-01-2017/bedrock,analytics-pros/mozilla-bedrock,ericawright/bedrock,sgarrity/bedrock,kyoshino/bedrock,glogiotatidis/bedrock,flodolo/bedrock