Fix compiler options for test_kernel



git-svn-id: file:///var/johncronin-svn/rpi-boot@59 0f3ef04d-8e58-4d2a-b558-b31704943fbb
Merge branch 'master' of github.com:jncronin/rpi-boot

git-svn-id: file:///var/johncronin-svn/rpi-boot@60 0f3ef04d-8e58-4d2a-b558-b31704943fbb