Changing CFLAGS for i386 packages on x86_64 (benchmarks included)

[dragoran]

I did same benchmarks using flops.c (attached) the results are attached 
to it seems that
-march=k8 -mtune=k8 -m32 is the fastes but not by much ...
the last one (-m64) is weird (much slower!!) no -OX was used.
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