Fix paths to Fuchsia crates.

Change-Id: Ibdb8b59e324143ded72d2c026abb14b68e97079f
diff --git a/Cargo.toml b/Cargo.toml
index b0c417c..7d28730 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@
 futures = "0.1.15"
 
 [target.'cfg(target_os = "fuchsia")'.dependencies]
-fuchsia-zircon = { path = "../../garnet/public/rust/crates/fuchsia-zircon" }
+fuchsia-zircon = { path = "../../../garnet/public/rust/crates/fuchsia-zircon" }
 
 [dev-dependencies]
 env_logger = { version = "0.4", default-features = false }