[Issue 15512] extern(C++, ns) should consider taking a string

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=15512

--- Comment #1 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/dlang/dmd

https://github.com/dlang/dmd/commit/d9747003d45d205ff5348bfbe3f5d9779ae62732
Fix Issue 15512 - Implement better C++ name mangling feature.

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