Fix the retrieve of the UNIX address as an UnsafeMutablePointer for b…

[levivic]

…ig endian

Description

When retrieving the UNIX address as an UnsafeMutablePointer, the current code was only for little endian. Therefore, on big endian platform, the field, i.e., sa_family_t, of such an UnsafeMutablePointer cannot be correctly recovered.

Motivation and Context

The fix is to swap the byte mapping to address of afUnixShort, which is an UInt16 on big endian platform.

How Has This Been Tested?

Run swift test, all tests got passed. Also, failures in Kitura because of this issue got fixed after the fix.

Checklist:

• I have submitted a CLA form
• If applicable, I have updated the documentation accordingly.
• If applicable, I have added tests to cover my changes.

[CLAassistant]

All committers have signed the CLA.

[billabt]

👍

[levivic]

Thanks.