Set LIBPATH

Author: Kai Luo

src/bootstrap/bootstrap.py

@@ -741,6 +741,9 @@ def build_bootstrap(self, color, verbose_count):
         env["LIBRARY_PATH"] = os.path.join(self.bin_root(), "lib") + \
             (os.pathsep + env["LIBRARY_PATH"]) \
             if "LIBRARY_PATH" in env else ""
+        env["LIBPATH"] = os.path.join(self.bin_root(), "lib") + \
+            (os.pathsep + env["LIBPATH"]) \
+            if "LIBPATH" in env else ""
 
         # Export Stage0 snapshot compiler related env variables
         build_section = "target.{}".format(self.build)