[mingw32-runtime/f16] (2 commits) ...GCC 4.6 compatibility patch from upstream

[Kalev Lember]

Summary of changes:

  2ab1639... Fix float.h when gcc's float.h precedes it in the include p (*)
  3011531... GCC 4.6 compatibility patch from upstream (*)

(*) This commit already existed in another branch; no separate mail sent