samples/seccomp: Fix 32-bit build

Both the .o and the actual executable need to be built with -m32 in order
to link correctly.

Reported-by: Ingo Molnar <[email protected]>
Signed-off-by: Tycho Andersen <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: James Morris <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Fixes: fec7b66 ("samples: add an example of seccomp user trap")
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

samples/seccomp/Makefile

@@ -34,6 +34,7 @@ HOSTCFLAGS_bpf-direct.o += $(MFLAG)
 HOSTCFLAGS_dropper.o += $(MFLAG)
 HOSTCFLAGS_bpf-helper.o += $(MFLAG)
 HOSTCFLAGS_bpf-fancy.o += $(MFLAG)
+HOSTCFLAGS_user-trap.o += $(MFLAG)
 HOSTLDLIBS_bpf-direct += $(MFLAG)
 HOSTLDLIBS_bpf-fancy += $(MFLAG)
 HOSTLDLIBS_dropper += $(MFLAG)