improve FlagIncludedChunksPlugin performance
improve FlagIncludedChunksPlugin performance

using bitmasks and clever bitwise and/or for a fast "maybe contains" check

EliteScientist/webpack,NekR/webpack,SimenB/webpack,NekR/webpack,SimenB/webpack,webpack/webpack,EliteScientist/webpack,SimenB/webpack,SimenB/webpack,webpack/webpack,webpack/webpack,webpack/webpack