Update zh-cn/strings.js

[fengdi]

zh-cn translation FIND_MENU and CMD_FIND_IN_SELECTED

[bchintx]

@fengdi Thanks for submitting this updated translation.

Before we can accept your changes, can you please submit a Contributors License Agreement, which can be found here: http://dev.brackets.io/brackets-contributor-license-agreement.html

Thanks!

[ingorichter]

@fengdi Would you mind signing the Brackets CLA? Otherwise we can't accept your contribution. Thank you.

[fengdi]

@ingorichter Thx. I have signed it. Now how can I do? Resubmit it?

[ingorichter]

@fengdi Thank you for accepting the CLA. To make it perfect, it would be great to create a PR based on the release branch. Can you please update the comment at the bottom of strings.js with the SHA of the src/nls/root/strings.js file that you based your translation off? Thanks.

[bchintx]

Verified that the CLA was signed and that the build worked. Since we already released, merging into master is fine. Merging...

[bchintx]

oh, and I checked and the "Last translated" SHA doesn't change. Looks like the latest translation for this language is still based off of the same cd86e0f9f9 SHA.