Fix build failed for visual studio in multi-byte windows environments (#7235)
Fix build failed for visual studio in multi-byte windows environments (#7235)

* Set source and executable charset to utf-8 when Visual Studio

* Remove unnecessary version check for visual studio
google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf