Fix minor typo in folly/Conv.h
Fix minor typo in folly/Conv.h

Summary: 'flating point' => 'floating point'

Closes https://github.com/facebook/folly/issues/241

Reviewed By: yfeldblum

Differential Revision: D2685280

fb-gh-sync-id: 2e9c2b5419d0c631af4a32c5ab6b7366033ca34c

mqeizi/folly,alexst07/folly,floxard/folly,Orvid/folly,rklabs/folly,charsyam/folly,alexst07/folly,charsyam/folly,Hincoin/folly,Hincoin/folly,sonnyhu/folly,Orvid/folly,juniway/folly,alexst07/folly,facebook/folly,brunomorishita/folly,brunomorishita/folly,juniway/folly,brunomorishita/folly,alexst07/folly,sonnyhu/folly,sonnyhu/folly,mqeizi/folly,facebook/folly,juniway/folly,rklabs/folly,brunomorishita/folly,juniway/folly,mqeizi/folly,sonnyhu/folly,mqeizi/folly,Orvid/folly,Orvid/folly,floxard/folly,rklabs/folly,charsyam/folly,charsyam/folly,Hincoin/folly,sonnyhu/folly,facebook/folly,facebook/folly,mqeizi/folly,brunomorishita/folly,juniway/folly,rklabs/folly,Hincoin/folly,floxard/folly,Orvid/folly,alexst07/folly,floxard/folly,Hincoin/folly,rklabs/folly,facebook/folly,floxard/folly