Update libsnark dependency.

depends/packages/libsnark.mk

@@ -3,8 +3,8 @@ $(package)_version=0.1
 $(package)_download_path=https://github.com/zcash/$(package)/archive/
 $(package)_file_name=$(package)-$($(package)_git_commit).tar.gz
 $(package)_download_file=$($(package)_git_commit).tar.gz
-$(package)_sha256_hash=369fe9f5a8018eb46cce3cf50bfbf21419d8e963b25067ffd00cb9ac5c39f649
-$(package)_git_commit=11242d8afe304c8bcc252baec483f04a110d1dd4
+$(package)_sha256_hash=cf002c50711654f0a4abb76b63f5b7d3679403822025772acc334bc7992e9494
+$(package)_git_commit=d65904ac6f1c0f7676035e62f84d6352b386ba45
 
 $(package)_dependencies=libgmp libsodium