Auto merge of rust-lang#603 - Uplifting:master, r=alexcrichton

Add gmtime()

Also slightly modified argument name for localtime.

Author: bors

src/unix/mod.rs

@@ -715,8 +715,10 @@ extern {
     pub fn mktime(tm: *mut tm) -> time_t;
     #[cfg_attr(target_os = "netbsd", link_name = "__time50")]
     pub fn time(time: *mut time_t) -> time_t;
+    #[cfg_attr(target_os = "netbsd", link_name = "__gmtime50")]
+    pub fn gmtime(time_p: *const time_t) -> *mut tm;
     #[cfg_attr(target_os = "netbsd", link_name = "__locatime50")]
-    pub fn localtime(time: *const time_t) -> *mut tm;
+    pub fn localtime(time_p: *const time_t) -> *mut tm;
 
     #[cfg_attr(target_os = "netbsd", link_name = "__mknod50")]
     pub fn mknod(pathname: *const ::c_char, mode: ::mode_t,