rpi: enable gcc stack clash protection

This setting was introduced in PTXdist 2019.03.0:

    Generate code to prevent stack clash style attacks. When this
    option is enabled, the compiler will only allocate one page of
    stack space at a time and each page is accessed immediately after
    allocation. Thus, it prevents allocations from jumping over any
    stack guard page provided by the operating system.

Make use of it to get more secure binaries with gcc-8's new
-fstack-clash-protection option.

Signed-off-by: Roland Hieber <rhi@pengutronix.de>

0 files changed, 0 insertions, 0 deletions