Updated test_utils to gcc 0.3.

Author: SSheldon

test_utils/Cargo.toml

@@ -15,4 +15,4 @@ name = "objc_test_utils"
 path = "lib.rs"
 
 [build-dependencies]
-gcc = "0.1"
+gcc = "0.3"

test_utils/build.rs

@@ -1,8 +1,5 @@
 extern crate gcc;
 
-use std::default::Default;
-
 fn main() {
-    let config = Default::default();
-    gcc::compile_library("libblock_utils.a", &config, &["block_utils.m"]);
+    gcc::compile_library("libblock_utils.a", &["block_utils.m"]);
 }