fix build by working around #1600238 - duplicate files in usr/share/pkgconfig
fix build by working around #1600238 - duplicate files in usr/share/pkgconfig

elopio/snappy-playpen,jamestait/snappy-playpen,ubuntu/snappy-playpen,elopio/snappy-playpen,elopio/snappy-playpen,ubuntu/snappy-playpen,jamestait/snappy-playpen,jamestait/snappy-playpen,jamestait/snappy-playpen,ubuntu/snappy-playpen,Zap123/snappy-playpen,elopio/snappy-playpen,ubuntu/snappy-playpen,Zap123/snappy-playpen