* Rewritten 128-bit integer "type" to use two 64-bit ints (they are
enough), and made it a proper struct instead of an array.
* Rewritten all single-bit shift loops to multi-bit shifts with the
help of CLZ, and used `__builtin_clzll` where available.
* Simplified (and documented) 128-bit DIV10 operation.
* Renamed 128-bit integer handling macros to use simpler names.
(And removed unused macros that were laying around.)
JerryScript-DCO-1.0-Signed-off-by: Akos Kiss [email protected]