[PATCH] [PECOFF] Do not use layout-after/before relationships for grouped sections.

[Rui Ueyama]

  How these conditions to sort atoms selected? These seems a bit arbitrary, and so is the order of them. Why is the layout-before/after relationship has 4th precedence after permission, content type, and position preference. Should we represent them only with the lyaout-before/after?

  I mean, the reason to add this logic would be the same as for the sorting conditions other than the layout-before/after, except that the logic makes sense only for COFF.

http://llvm-reviews.chandlerc.com/D1292