Fixed nanosleep function sig test.

[SVN r11389]

test/boost_has_nanosleep.ipp

@@ -16,7 +16,8 @@ void f()
 {
     // this is never called, it just has to compile:
     timespec ts = {0};
-    int res = nanosleep(&ts);
+    timespec rm;
+    int res = nanosleep(&ts, &rm);
 }
 
 int test()