[Issue 23177] New: ModuleInfo is not exported on Windows

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23177

          Issue ID: 23177
           Summary: ModuleInfo is not exported on Windows
           Product: D
           Version: D2
          Hardware: All
                OS: Windows
            Status: NEW
          Severity: blocker
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: alphaglosined at gmail.com

When ModuleInfo is generated it is not added to the export tables.

This can lead to linker errors with shared libraries.

This should hopefully be a fairly simple fix, a one-liner and I'll be
attempting it. If not I'll add a test case.

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