Merge pull request bitcoin#788 from nkohen/2019-06-13-fix-gcs-reference-link

BIP 158: Updated Golomb-Rice Coded sets Reference Implementation link

Author: luke-jr

bip-0158.mediawiki

@@ -347,7 +347,7 @@ Light client: [https://github.com/lightninglabs/neutrino]
 
 Full-node indexing: https://github.com/Roasbeef/btcd/tree/segwit-cbf
 
-Golomb-Rice Coded sets: https://github.com/Roasbeef/btcutil/tree/gcs/gcs
+Golomb-Rice Coded sets: https://github.com/btcsuite/btcutil/blob/master/gcs
 
 == Appendix A: Alternatives ==