[Issue 22880] importC: support __restrict__ __signed__ __asm__

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22880

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|x86_64                      |All
            Summary|importC: __restrict         |importC: support
                   |restrict __restrict__       |__restrict__ __signed__
                   |                            |__asm__
                 OS|Linux                       |All

--