Fix patch file against Zombie 6.1.2

fixes #2707

patches/zombie-vm-timeout.patch

@@ -1,11 +1,11 @@
---- src/drivers/npm/node_modules/zombie/lib/document.js	2018-04-20 14:36:04.097829977 +1000
-+++ src/drivers/npm/node_modules/zombie/lib/document.js	2018-04-20 14:34:25.699317000 +1000
-@@ -281,7 +281,7 @@
-       // The current window, postMessage and window.close need this
+--- src/drivers/npm/node_modules/zombie/lib/document.js
++++ src/drivers/npm/node_modules/zombie/lib/document.js
+@@ -247,7 +247,7 @@ function setupWindow(window, args) {
        browser._windowInScope = window;
-       var result = undefined;
--      if (typeof code === 'string' || code instanceof String) result = VM.runInContext(code, window, { filename: filename });else if (code) result = code.call(window);
-+      if (typeof code === 'string' || code instanceof String) result = VM.runInContext(code, window, { filename: filename, timeout: 1000 });else if (code) result = code.call(window);
+       let result;
+       if (typeof code == 'buffer' || code instanceof Buffer) code = code.toString();
+-      if (typeof code === 'string' || code instanceof String) result = VM.runInContext(code, context, { filename });else if (code) result = code.call(window);
++      if (typeof code === 'string' || code instanceof String) result = VM.runInContext(code, context, { filename, timeout: 1000 });else if (code) result = code.call(window);
        browser.emit('evaluated', code, result, filename);
        return result;
      } catch (error) {