Re-enable test on Android

Closes #10379.

Author: tamird

src/libstd/dynamic_lib.rs

@@ -133,7 +133,7 @@ mod test {
     use path::Path;
 
     #[test]
-    #[cfg_attr(any(windows, target_os = "android"), ignore)] // FIXME #8818, #10379
+    #[cfg_attr(any(windows), ignore)] // FIXME #8818
     fn test_loading_cosine() {
         // The math library does not need to be loaded since it is already
         // statically linked in