fix(@angular/cli): resolve in all available node_modules

When @angular/cli dependencies (like @ngtool/webpack for example) are installed in its node_modules (as node_modules/@angular/cli/node_modules for example) webpack isn't seeing them.

Author: douglasduteil

packages/@angular/cli/models/webpack-configs/common.ts

@@ -70,9 +70,9 @@ export function getCommonConfig(wco: WebpackConfigOptions) {
       modules: ['node_modules', nodeModules],
     },
     resolveLoader: {
-      modules: [nodeModules]
+      modules: [nodeModules, 'node_modules']
     },
-    context: projectRoot,
+    context: __dirname,
     entry: entryPoints,
     output: {
       path: path.resolve(projectRoot, buildOptions.outputPath),

tests/e2e/tests/misc/loaders-resolution.ts

@@ -0,0 +1,12 @@
+import { createDir, moveFile } from '../../utils/fs';
+import { ng } from '../../utils/process';
+
+export default async function () {
+  await createDir('node_modules/@angular/cli/node_modules');
+  await moveFile(
+    'node_modules/@ngtools',
+    'node_modules/@angular/cli/node_modules/@ngtools'
+  );
+
+  await ng('build');
+}