[Issue 18989] On OSX32, core.stdc.time.clock() should resolve to clock$UNIX2003()

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18989

--- Comment #1 from Walter Bright <bugzilla at digitalmars.com> ---
It's defined in the system headers as:

clock_t clock(void) __asm("_" "clock" "$UNIX2003");

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