Impl Clone for EventsLoopProxy (#331)

src/platform/linux/mod.rs

@@ -297,6 +297,7 @@ pub enum EventsLoop {
     X(x11::EventsLoop)
 }
 
+#[derive(Clone)]
 pub enum EventsLoopProxy {
     X(x11::EventsLoopProxy),
     Wayland(wayland::EventsLoopProxy),

src/platform/linux/wayland/event_loop.rs

@@ -76,6 +76,7 @@ pub struct EventsLoop {
 // A handle that can be sent across threads and used to wake up the `EventsLoop`.
 //
 // We should only try and wake up the `EventsLoop` if it still exists, so we hold Weak ptrs.
+#[derive(Clone)]
 pub struct EventsLoopProxy {
     display: Weak<wl_display::WlDisplay>,
     pending_wakeup: Weak<AtomicBool>,

src/platform/linux/x11/mod.rs

@@ -43,6 +43,7 @@ pub struct EventsLoop {
     wakeup_dummy_window: ffi::Window,
 }
 
+#[derive(Clone)]
 pub struct EventsLoopProxy {
     pending_wakeup: Weak<AtomicBool>,
     display: Weak<XConnection>,