Support --gtest_stream_result_to on Windows

**Does the feature exist in the most recent commit?**

No

**Why do we need this feature?**

There is no other built-in streaming support, and currently this feature excludes Windows. This feature provides the best way to communicate results back from a compiled test exe in a programmatic way while the test is running.

**Describe the proposal**

Update
[StreamingListener](https://github.com/google/googletest/blob/86add13493e5c881d7e4ba77fb91c1f57752b3a4/googletest/include/gtest/internal/gtest-port.h#L620)
to include this define on Windows (and make other changes needed for compilation to succeed on Windows; Windows supports sockets but some includes/APIs may be different).

**Is the feature specific to an operating system, compiler, or build system version?**

Yes; Windows (but not any specific version).