Support in ao-cad for aarch64.

Submitted upstream at https://github.com/mkeeter/ao/issues/69

--- ao/ui/vendor/efsw/src/efsw/inotify-nosys.h.orig	2017-12-14 16:27:16.125871099 -0600
+++ ao/ui/vendor/efsw/src/efsw/inotify-nosys.h	2017-12-14 16:26:39.786022981 -0600
@@ -69,6 +69,11 @@
 # define __NR_inotify_add_watch (__NR_SYSCALL_BASE+317)
 # define __NR_inotify_rm_watch (__NR_SYSCALL_BASE+318)
 
+#elif defined (__aarch64__)
+# define __NR_inotify_init 1043
+# define __NR_inotify_add_watch 27
+# define __NR_inotify_rm_watch 28
+
 #elif defined (__frv__)
 # define __NR_inotify_init 291
 # define __NR_inotify_add_watch 292