Add new regnode: ANYOFH, without a bitmap

Add new regnode: ANYOFH, without a bitmap

This commit adds a regnode for the case where nothing in the bit map has
matches.  This allows the bitmap to be omitted, saving 32 bytes of
otherwise wasted space per node.  Many non-Latin Unicode properties have
this characteristic.  Further, since this node applies only to code
points above 255, which are representable only in UTF-8, we can
trivially fail a match where the target string isn't in UTF-8.  Time
savings also accrue from skipping the bitmap look-up.  When swashes are
removed, even more time will be saved.