tests: fix 32-bit x86 register names

The syscall register name on 32-bit x86 is eax not ax.

Signed-off-by: Kees Cook <keescook@chromium.org>
tests: eliminated format size warnings

Add unsigned long casts to silence format size warnings.

Signed-off-by: Kees Cook <keescook@chromium.org>
Merge pull request #12 from kees/trace

Trace