RFR 8026712,TEST_BUG: update sun/security/tools/keytool/autotest.sh with a new location to find of libsoftokn3.so

[Weijun Wang]

Hi Vinnie

Please take a review at this fix
  http://cr.openjdk.java.net/~weijun/8026712/webrev.00

It seems the PKCS11Test.java file also hardcoded the paths. But I don't 
know what other archs to add.

Thanks
Max