[Bug ld/23762] New: __CTOR_LIST__ should be aligned at 4 bytes for i686-windows-mingw32

[pirama at google dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23762

            Bug ID: 23762
           Summary: __CTOR_LIST__ should be aligned at 4 bytes for
                    i686-windows-mingw32
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: pirama at google dot com
                CC: martin at martin dot st
  Target Milestone: ---

This seems to be fine until now but the combination of clang + libc++ + MinGW
causes issues where __CTOR_LIST__ is not aligned at 4 bytes, causing garbage
after the -1 at the beginning.

This seems like a safe change considering that __CTOR_LIST__ is aligned to 8
bytes for 64-bit (ld/scripttempl/pep.sc).  I can try to find a reduced test
case if not.

(If there're instructions on how to submit a patch, I'm happy to send one).

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