Mirror clang's link stage on Windows.

Fixes problem discussed in #811.

Author: dot-asm

src/lib.rs

@@ -1763,6 +1763,10 @@ impl Build {
                     // depending on the origin clang can default to a mismatchig
                     // run-time.
                     cmd.push_cc_arg(format!("--target={}", target).into());
+                    if target.contains("msvc") {
+                        // Mirror what clang does at link stage
+                        self.print(&format_args!("cargo:rustc-link-lib=oldnames"));
+                    }
                 }
 
                 if cmd.family == ToolFamily::Clang && target.contains("android") {