Makefile: move stack-protector compiler breakage test earlier

Makefile: move stack-protector compiler breakage test earlier

In order to make stack-protector failures warn instead of unconditionally
breaking the build, this moves the compiler output sanity-check earlier,
and sets a flag for later testing.  Future patches can choose to warn or
fail, depending on the flag value.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Kees Cook <[email protected]>
Tested-by: Laura Abbott <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Josh Triplett <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>