Add pthread_condattr_setclock

Author: jackpot51

src/unix/redox/mod.rs

@@ -343,6 +343,10 @@ extern {
                           attr: *const ::pthread_attr_t,
                           start: extern fn(*mut ::c_void) -> *mut ::c_void,
                           arg: *mut ::c_void) -> ::c_int;
+    // TODO: relibc {
+        pub fn pthread_condattr_setclock(attr: *mut pthread_condattr_t,
+                                         clock_id: ::clockid_t) -> ::c_int;
+    // }
 }
 
 // signal.h