Commit e61061a0886e2d0d6b075d75ae9b53d0a6bc9042 added support for hardening
options in the toolchain. However this breaks the gcc5.5.0 compilation in
case FORTIFY_SOURCE is set different from FORTIFY_SOURCE_NONE as reported
in [1].
Fix this by backporting the upstream patch which fixes this in later gcc versions
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?format=multiple&id=61164
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
