[cherry-pick] ignore sass cache
[cherry-pick] ignore sass cache

guicho271828/2017-6-14-aist-interview,guicho271828/another-org-info,guicho271828/another-org-info,guicho271828/another-org-info,guicho271828/2017-6-14-aist-interview,guicho271828/another-org-info,guicho271828/2017-6-14-aist-interview,guicho271828/2017-6-14-aist-interview,guicho271828/2017-6-14-aist-interview,guicho271828/another-org-info