Add debug test for uglify

test/debug-fixtures/builtins-uglify/options.json

@@ -0,0 +1,13 @@
+{
+  "presets": [
+    ["../../lib", {
+      "debug": true,
+      "targets": {
+        "chrome": 55,
+        "uglify": true
+      },
+      "useBuiltIns": true,
+      "modules": false
+    }]
+  ]
+}

test/debug-fixtures/builtins-uglify/stdout.txt

@@ -0,0 +1,41 @@
+babel-preset-env: `DEBUG` option
+
+Using targets:
+{
+  "chrome": 55,
+  "uglify": true
+}
+
+Modules transform: false
+
+Using plugins:
+  transform-es2015-arrow-functions {"uglify":true}
+  transform-es2015-block-scoped-functions {"uglify":true}
+  transform-es2015-block-scoping {"uglify":true}
+  transform-es2015-classes {"uglify":true}
+  transform-es2015-computed-properties {"uglify":true}
+  check-es2015-constants {"uglify":true}
+  transform-es2015-destructuring {"uglify":true}
+  transform-es2015-for-of {"uglify":true}
+  transform-es2015-function-name {"uglify":true}
+  transform-es2015-literals {"uglify":true}
+  transform-es2015-object-super {"uglify":true}
+  transform-es2015-parameters {"uglify":true}
+  transform-es2015-shorthand-properties {"uglify":true}
+  transform-es2015-spread {"uglify":true}
+  transform-es2015-sticky-regex {"uglify":true}
+  transform-es2015-template-literals {"uglify":true}
+  transform-es2015-typeof-symbol {"uglify":true}
+  transform-es2015-unicode-regex {"uglify":true}
+  transform-regenerator {"uglify":true}
+  transform-exponentiation-operator {"uglify":true}
+  transform-async-to-generator {"uglify":true}
+  syntax-trailing-function-commas {"chrome":55,"uglify":true}
+
+Using polyfills:
+  es7.string.pad-start {"chrome":55}
+  es7.string.pad-end {"chrome":55}
+  web.timers {"chrome":55}
+  web.immediate {"chrome":55}
+  web.dom.iterable {"chrome":55}
+src/in.js -> lib/in.js