[Bug other/63992] fcheck-pointer-bounds and friends are undocumented

[enkovich.gnu at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63992

--- Comment #1 from Ilya Enkovich <enkovich.gnu at gmail dot com> ---
It is a part of already approved patch
(https://gcc.gnu.org/ml/gcc-patches/2014-11/msg02317.html) which waits for MPX
runtime to be approved.