fix(@angular-devkit/build-angular): add symlinks option to resolveLoader

This is needed as otherwise under Bazel it will fail with `Angular Compiler was detected but it was an instance of the wrong class.` when not using the linker since node_modules will be linked to `external/npm`. Under Bazel `preserveSymlinks` is to be set to true, however with the current behaviour this doesn't effect resolveLoader.

Author: alan-agius4

packages/angular_devkit/build_angular/src/angular-cli-files/models/webpack-configs/common.ts

@@ -489,6 +489,7 @@ export function getCommonConfig(wco: WebpackConfigOptions): Configuration {
       alias,
     },
     resolveLoader: {
+      symlinks: !buildOptions.preserveSymlinks,
       modules: loaderNodeModules,
     },
     context: projectRoot,