Fix depenedncy to force libra-swarm use local client implementation.

Author: Yucong Sun

rust/Cargo.lock

@@ -58,4 +58,8 @@ compiler = { git = "https://github.com/libra/libra.git", branch = "testnet" }
 
 [features]
 default = []
-fuzzing = ["proptest", "libra-crypto/fuzzing", "fixme-libra-types/fuzzing"]
+fuzzing = ["proptest", "libra-crypto/fuzzing", "fixme-libra-types/fuzzing"]
+
+# Override depenedency to use local client implementation.
+[patch."https://github.com/libra/libra.git"]
+client = { path = "./" }