unix: add InotifyInit for mips64

Change-Id: If58ee4692cd7b22c293556fc320fb013cdb78bb6
GitHub-Last-Rev: 2b5b171559691fa560b450e0847e7004e665a373
GitHub-Pull-Request: golang/sys#58
Reviewed-on: https://go-review.googlesource.com/c/sys/+/218799
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
diff --git a/unix/syscall_linux_mips64x.go b/unix/syscall_linux_mips64x.go
index e9d2f1d..85a872d 100644
--- a/unix/syscall_linux_mips64x.go
+++ b/unix/syscall_linux_mips64x.go
@@ -224,3 +224,8 @@
 	}
 	return poll(&fds[0], len(fds), timeout)
 }
+
+func InotifyInit() (fd int, err error) {
+        return InotifyInit1(0)
+}
+