[Issue 21938] importC: Support __attribute__ specifiers that could be mapped to D attributes

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21938

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzilla at digitalmars.com

--- Comment #2 from Walter Bright <bugzilla at digitalmars.com> ---
- aligned
- aligned (alignment)

Now there are 3 ways to align in gcc:

#pragma pack
_Alignas
__attribute___

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