MacOSX: Build fat binaries i386...

revert part of 6e255a95

Chrome is still 32 bit only
This allows plugins running in Chrome (32bit) to use OpenSC PKCS#11, which would otherwise be only 64bit. Tokend "hides" the cpu architecture issue otherwise.
sc-hsm: reduce indicated maximum PIN length to 15

Fix bogus minimum PIN length to support more PIN pad readers