Actually add libuv-package (not libuv-build) repo

- libuv-build is already built outside of Universe and doesn't follow
  some conventions like running the normal build-compile target

makefile.shade

@@ -740,7 +740,7 @@ functions
         {
             IEnumerable<string> reposToBuild = new HashSet<string>(StringComparer.OrdinalIgnoreCase) {
                 // The repos list is topologically sorted based on build order
-                "libuv-build",
+                "libuv-package",
                 "PlatformAbstractions",
                 "Common",
                 "JsonPatch",