Hopefully make issue 2214 test case work on Windows -- sigh

Author: catamorphism

src/test/run-pass/issue-2214.rs

@@ -8,8 +8,13 @@ fn lgamma(n: c_double, value: &mut int) -> c_double {
 #[link_name = "m"]
 #[abi = "cdecl"]
 native mod m {
+    #[cfg(unix)]
     #[link_name="lgamma_r"] fn lgamma(n: c_double, sign: &mut c_int)
       -> c_double;
+    #[cfg(windows)]
+    #[link_name="__lgamma_r"] fn lgamma(n: c_double,
+                                        sign: &mut c_int) -> c_double;
+
 }
 
 fn main() {