Update README.Linux.md common pitfalls
Update README.Linux.md common pitfalls

* recent V8 versions need to be compiled with snnapshot=off to be usable
* use more meaningful destination path
stesie/v8js,zzhh9857/v8js,zzhh9857/v8js,dayed/v8js,phpv8/v8js,uniconstructor/v8js,phpv8/v8js,uniconstructor/v8js,zzhh9857/v8js,dayed/v8js,preillyme/v8js,zzhh9857/v8js,dayed/v8js,phpv8/v8js,preillyme/v8js,dayed/v8js,stesie/v8js,uniconstructor/v8js,uniconstructor/v8js,stesie/v8js,ABaldwinHunter/v8js-clone,ABaldwinHunter/v8js-clone,ABaldwinHunter/v8js-clone,preillyme/v8js,stesie/v8js,ABaldwinHunter/v8js-clone,preillyme/v8js