Update the jscop tests and port them to isl codegen.

  The updated tests use a different context than the old ones did.
  Other than that only their path and the code generation we use
  changed.


git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@214657 91177308-0d34-0410-b5e6-96231b3b80d8