Add array pattern to exports destructuring.

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-array/actual.js

@@ -0,0 +1 @@
+export const [ foo, bar ] = [];

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-array/expected.js

@@ -0,0 +1,5 @@
+"use strict";
+
+const [foo, bar] = [];
+exports.foo = foo;
+exports.bar = bar;