make Configure recognize powerux hint (perl5.004_01)

make Configure recognize powerux hint (perl5.004_01)

This is my day for building perl on various flavor Concurrent boxes - here's
a minor Configure patch for a different operating system.

Version 5.004_01 seems to build, link, and pass all tests perfectly "out of
the box" on Concurrent's PowerMAX OS, but because marketing keeps changing
the name of the operating system, Configure needs a small patch to recognize
all the possible versions of uname output and pick the right hint file. (I
suppose it would make marketing happier if I renamed powerux.sh to
powermax.sh, but I have the feeling they'll change the name again real soon
now, so I'm just gonna leave the hints file with the name it already has
:-).

I did try this patch, and it seemed to recognize the proper hints file
correctly when I built.

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