fix sh_test dirname
fix sh_test dirname

Summary: Quick fix a dirname in sh_test

Reviewed By: ttsugriy

fbshipit-source-id: 79f265e

Addepar/buck,shs96c/buck,kageiit/buck,JoelMarcey/buck,SeleniumHQ/buck,shs96c/buck,rmaz/buck,JoelMarcey/buck,brettwooldridge/buck,nguyentruongtho/buck,shs96c/buck,rmaz/buck,kageiit/buck,SeleniumHQ/buck,brettwooldridge/buck,Addepar/buck,shs96c/buck,romanoid/buck,SeleniumHQ/buck,kageiit/buck,romanoid/buck,zpao/buck,romanoid/buck,JoelMarcey/buck,JoelMarcey/buck,nguyentruongtho/buck,zpao/buck,zpao/buck,JoelMarcey/buck,zpao/buck,brettwooldridge/buck,JoelMarcey/buck,rmaz/buck,rmaz/buck,romanoid/buck,romanoid/buck,rmaz/buck,romanoid/buck,Addepar/buck,JoelMarcey/buck,Addepar/buck,JoelMarcey/buck,romanoid/buck,SeleniumHQ/buck,JoelMarcey/buck,zpao/buck,facebook/buck,Addepar/buck,rmaz/buck,Addepar/buck,brettwooldridge/buck,shs96c/buck,romanoid/buck,facebook/buck,brettwooldridge/buck,shs96c/buck,rmaz/buck,SeleniumHQ/buck,JoelMarcey/buck,brettwooldridge/buck,SeleniumHQ/buck,brettwooldridge/buck,facebook/buck,SeleniumHQ/buck,romanoid/buck,rmaz/buck,facebook/buck,nguyentruongtho/buck,shs96c/buck,JoelMarcey/buck,shs96c/buck,brettwooldridge/buck,brettwooldridge/buck,JoelMarcey/buck,Addepar/buck,SeleniumHQ/buck,Addepar/buck,romanoid/buck,kageiit/buck,brettwooldridge/buck,romanoid/buck,brettwooldridge/buck,SeleniumHQ/buck,zpao/buck,nguyentruongtho/buck,rmaz/buck,shs96c/buck,romanoid/buck,SeleniumHQ/buck,Addepar/buck,kageiit/buck,shs96c/buck,zpao/buck,nguyentruongtho/buck,facebook/buck,shs96c/buck,rmaz/buck,rmaz/buck,shs96c/buck,facebook/buck,Addepar/buck,kageiit/buck,SeleniumHQ/buck,SeleniumHQ/buck,nguyentruongtho/buck,brettwooldridge/buck,facebook/buck,shs96c/buck,Addepar/buck,JoelMarcey/buck,brettwooldridge/buck,SeleniumHQ/buck,rmaz/buck,romanoid/buck,nguyentruongtho/buck,Addepar/buck,rmaz/buck,Addepar/buck,kageiit/buck