Backport a patch to fix errors such as:
error: aggregate 'sigaltstack handler_stack' has incomplete type and cannot be defined
(From OE-Core rev: 6a3d9e53e3b3340c48af2242c9871bb2e0a763f5)
Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>