[Issue 21937] New: importC: Support parsing __attribute specifiers

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21937

          Issue ID: 21937
           Summary: importC: Support parsing __attribute specifiers
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: major
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: ibuclaw at gdcproject.org

The aim is just to initially ignore attributes, meaning can be given to them
later.
---
int fun() __attribute((pure));

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