Fix tests.

Author: dvc94ch

android-ndk-sys/src/lib.rs

@@ -37,5 +37,6 @@ include!("ffi_i686.rs");
 #[cfg(all(any(target_os = "android", test), target_arch = "x86_64"))]
 include!("ffi_x86_64.rs");
 
+#[cfg(target_os = "android")]
 #[link(name = "android")]
 extern "C" {}