 add  see ticket #8187 

Issue created from code comment with imdone.io

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TODO:  add StringPiece::compare(), see ticket #8187 id:140
[**deps/icu-small/source/common/bytestriebuilder.cpp:115**](https://github.com/imdone/node/blob/9e8f4b3834263f0c66fb0f5483c4284a4d8ea682/deps/icu-small/source/common/bytestriebuilder.cpp#L115)
