Fix dependency on fuchsia-zircon

Change-Id: Ie6d1294450d39002562d6df0eb26f83daf3fbb29
diff --git a/Cargo.toml b/Cargo.toml
index d1d16d9..90a2213 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,4 +27,4 @@
 members = ["rand-derive"]
 
 [target.'cfg(target_os = "fuchsia")'.dependencies]
-fuchsia-zircon = { path = "../../../garnet/public/rust/crates/fuchsia-zircon" }
+fuchsia-zircon = "0.3"