PAC list bugs

[pexcn]

https://github.com/R0uter/gfw_domain_whitelist/commit/bede42eca79280237f3f4b00e19d6a0895ef53c5#r37204721

in javascript, the operands of all bitwise operators are converted to signed 32-bit integers in two's complement format, so "172 << 24" is a negative number in this pac script, we use "result >>> 0" to fix it