Vendor dependencies for 0.3.0 release

vendor/libloading/tests/library_filename.rs

@@ -0,0 +1,17 @@
+extern crate libloading;
+use libloading::library_filename;
+use std::path::Path;
+
+#[cfg(any(target_os = "windows", target_os = "cygwin"))]
+const EXPECTED: &str = "audioengine.dll";
+#[cfg(target_os = "linux")]
+const EXPECTED: &str = "libaudioengine.so";
+#[cfg(target_os = "macos")]
+const EXPECTED: &str = "libaudioengine.dylib";
+
+#[test]
+fn test_library_filename() {
+    let name = "audioengine";
+    let resolved = library_filename(name);
+    assert!(Path::new(&resolved).ends_with(EXPECTED));
+}