Update to new compiler flag syntax

Bump to 0.1.5

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "gcc"
-version = "0.1.4"
+version = "0.1.5"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
 license = "MIT/Apache-2.0"
 repository = "https://github.com/alexcrichton/gcc-rs"

src/lib.rs

@@ -111,7 +111,7 @@ pub fn compile_library(output: &str, config: &Config, files: &[&str]) {
                                            .arg(dst.join(output))
                                            .args(objects.as_slice())
                                            .args(config.objects.as_slice()));
-    println!("cargo:rustc-flags=-L native={} -l {}:static",
+    println!("cargo:rustc-flags=-L native={} -l static={}",
              dst.display(), output.slice(3, output.len() - 2));
 }