Merge pull request bitcoin#902 from Kevingislason/patch-1

BIP 39: Update Rust implementation

Author: luke-jr

bip-0039.mediawiki

@@ -160,7 +160,7 @@ Ruby:
 * https://github.com/sreekanthgs/bip_mnemonic
 
 Rust:
-* https://github.com/infincia/bip39-rs
+* https://github.com/maciejhirsz/tiny-bip39/
 
 Swift:
 * https://github.com/CikeQiu/CKMnemonic