Sync fenv.h

See See 0f7809d5c364565e210554ca2b5d8eedf8a57ec7
90e10d41c4271a5d517f60f4ff1d2891b8ccc034

Change-Id: Id59b6c24f74f03f7d4b0c420fdb59fb2ab98be0d
3 files changed