compositor: fix a minor typo

emited -> emitted

Signed-off-by: Abdur Rehman <arehmanq199@gmail.com>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
diff --git a/libweston/compositor.c b/libweston/compositor.c
index 508c2a9..f9175fb 100644
--- a/libweston/compositor.c
+++ b/libweston/compositor.c
@@ -4326,7 +4326,7 @@
  * applies the necessary changes.
  * All views assigned to the weston_output object are
  * moved to a new output.
- * Signal is emited to notify all users of the weston_output
+ * Signal is emitted to notify all users of the weston_output
  * object that the output is being destroyed.
  * wl_output protocol objects referencing this weston_output
  * are made inert.