[Issue 17851] htonl already defined in phobos64.lib

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17851

--- Comment #2 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/dlang/druntime

https://github.com/dlang/druntime/commit/cf8ed256f956f1fb551c314881922b8fc817246b
core.sys.windows.winsock2: Don't implement htons() etc.

To prevent duplicate symbols when pulling in that object file and the
implementations in the ws2_32 library during linking.

fix issue 17851 and https://github.com/ldc-developers/ldc/issues/468

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