These are some things I noticed while working in this tree:

- target/ was not in .gitignore
- src/libzt.rs is generated, put in .gitignore and deleted
- time_t was not defined; libc is a build dep so didn't want to bring it
  in for a type. Decided to just typedef it.

Signed-off-by: Erik Hollensbe <linux@hollensbe.org>

pkg/crate/libzt/.gitignore

@@ -0,0 +1,2 @@
+target
+src/libzt.rs

pkg/crate/libzt/src/socket.rs

@@ -19,6 +19,8 @@ use std::os::raw::c_int;
 use std::time::Duration;
 use std::{io, mem};
 
+type time_t = i64;
+
 use crate::utils::*;
 
 // Note: FileDesc and c_int in libc are private so we can't use that. Use i32 instead