Fix fuchsia-zircon dep declaration

Change-Id: I572bf4fef229a78651846ebd17c90708a9dc48e5
diff --git a/Cargo.toml b/Cargo.toml
index 97d106d..4e6d0e8 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 = "0.3"
 
 [dev-dependencies]
 env_logger = { version = "0.4", default-features = false }