Compute and print the minimal loop carried dependency distance

  During the IslAst parallelism check also compute the minimal dependency
  distance and store it in the IstAst for node.

Reviewer: sebpop

Differential Revision: http://reviews.llvm.org/D4987


git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@217729 91177308-0d34-0410-b5e6-96231b3b80d8