[Issue 24319] New: OpenBSD: Use correct type for file_time

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24319

          Issue ID: 24319
           Summary: OpenBSD: Use correct type for file_time
           Product: D
           Version: D2
          Hardware: x86
                OS: Other
            Status: NEW
          Severity: minor
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: bcallah at openbsd.org

In https://github.com/dlang/dmd/blob/master/compiler/src/dmd/libmach.d#L488,
file_time is a c_long. However, in
https://github.com/dlang/dmd/blob/master/compiler/src/dmd/libmach.d#L228, it is
assigned from a statbuf.st_ctime, which is a time_t and thus always long on
OpenBSD. Fixing the type fixes the build on OpenBSD/i386.

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