Add semicolons after macro invocations, as required by the latest nightly.

examples/multiwindow.rs

@@ -9,7 +9,7 @@ extern crate glutin;
 mod support;
 
 #[cfg(target_os = "android")]
-android_start!(main)
+android_start!(main);
 
 #[cfg(not(feature = "window"))]
 fn main() { println!("This example requires glutin to be compiled with the `window` feature"); }