update documentation link to integration tests (#2106)
update documentation link to integration tests (#2106)

Summary:
I noticed when I clicked on "more examples" on the website I was linked to an outdated directory.
Pull Request resolved: https://github.com/facebook/buck/pull/2106

Reviewed By: ttsugriy

Pulled By: ttsugriy

fbshipit-source-id: 0f937927a9

SeleniumHQ/buck,romanoid/buck,JoelMarcey/buck,nguyentruongtho/buck,zpao/buck,zpao/buck,nguyentruongtho/buck,brettwooldridge/buck,rmaz/buck,romanoid/buck,facebook/buck,SeleniumHQ/buck,rmaz/buck,brettwooldridge/buck,SeleniumHQ/buck,facebook/buck,JoelMarcey/buck,Addepar/buck,facebook/buck,brettwooldridge/buck,rmaz/buck,nguyentruongtho/buck,romanoid/buck,zpao/buck,SeleniumHQ/buck,Addepar/buck,Addepar/buck,romanoid/buck,zpao/buck,brettwooldridge/buck,brettwooldridge/buck,zpao/buck,Addepar/buck,SeleniumHQ/buck,nguyentruongtho/buck,kageiit/buck,rmaz/buck,JoelMarcey/buck,nguyentruongtho/buck,brettwooldridge/buck,brettwooldridge/buck,romanoid/buck,JoelMarcey/buck,JoelMarcey/buck,rmaz/buck,kageiit/buck,brettwooldridge/buck,kageiit/buck,rmaz/buck,rmaz/buck,kageiit/buck,JoelMarcey/buck,brettwooldridge/buck,romanoid/buck,JoelMarcey/buck,rmaz/buck,rmaz/buck,romanoid/buck,SeleniumHQ/buck,SeleniumHQ/buck,romanoid/buck,Addepar/buck,SeleniumHQ/buck,JoelMarcey/buck,zpao/buck,romanoid/buck,Addepar/buck,facebook/buck,brettwooldridge/buck,Addepar/buck,zpao/buck,brettwooldridge/buck,brettwooldridge/buck,rmaz/buck,romanoid/buck,SeleniumHQ/buck,rmaz/buck,nguyentruongtho/buck,rmaz/buck,Addepar/buck,JoelMarcey/buck,romanoid/buck,JoelMarcey/buck,SeleniumHQ/buck,nguyentruongtho/buck,SeleniumHQ/buck,facebook/buck,JoelMarcey/buck,rmaz/buck,Addepar/buck,Addepar/buck,Addepar/buck,romanoid/buck,Addepar/buck,facebook/buck,SeleniumHQ/buck,brettwooldridge/buck,JoelMarcey/buck,Addepar/buck,kageiit/buck,kageiit/buck,romanoid/buck,JoelMarcey/buck,kageiit/buck,SeleniumHQ/buck,facebook/buck