Merge pull request #552 from fortanix/raoul/gh-551-fix_ci

Fix CI

Author: raoulstrackx

Cargo.lock

@@ -40,4 +40,4 @@ mbedtls = { git = "https://github.com/fortanix/rust-mbedtls", branch = "master"
 nix   = { git = "https://github.com/fortanix/nix.git", branch = "raoul/fortanixvme_r0.20.2" }
 serde = { git = "https://github.com/fortanix/serde.git", branch = "master" }
 vsock = { git = "https://github.com/fortanix/vsock-rs.git", branch = "fortanixvme" }
-rustc-serialize = { git = "https://github.com/jethrogb/rustc-serialize.git", branch = "portability" }
+rustc-serialize = { git = "https://github.com/fortanix/rustc-serialize.git", branch = "portability" }