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

[Shankar Kalpathi Easwaran]

  The comments seem to be outdated, We do things in this order

  a) SectionPosition
  b) override by layout-after/layout-before
  c) sort by permissions
  d) sort by input file order
  e) sort by atom ordinal

  which is proper.

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