build: add missing dependency for tar/repo substitution

(cherry picked from commit 10adcea)

Author: kormide

packages/angular_devkit/build_angular/BUILD.bazel

@@ -222,6 +222,7 @@ pkg_npm(
         "//packages/angular_devkit/architect:package.json",
         "//packages/angular_devkit/build_webpack:package.json",
         "//packages/angular_devkit/core:package.json",
+        "//packages/ngtools/webpack:package.json",
     ],
     deps = [
         ":README.md",