manager.c: Add Processed Call Count to CoreStatus output

This update adds the processed call count to the CoreStatus AMI Action responsie. This output is
similar to the values returned by "core show channels" or "core show calls" in the CLI.

UserNote: The current processed call count is now returned as CoreProcessedCalls from the
CoreStatus AMI Action.

(cherry picked from commit 0c193b725b)

main/manager.c

@@ -6453,13 +6453,15 @@ static int action_corestatus(struct mansession *s, const struct message *m)
 			"CoreReloadDate: %s\r\n"
 			"CoreReloadTime: %s\r\n"
 			"CoreCurrentCalls: %d\r\n"
+			"CoreProcessedCalls: %d\r\n"
 			"\r\n",
 			idText,
 			startupdate,
 			startuptime,
 			reloaddate,
 			reloadtime,
-			ast_active_channels()
+			ast_active_channels(),
+			ast_processed_calls()
 			);
 	return 0;
 }