[Bug testsuite/70699] New: Add pr70161.c test-case

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70699

            Bug ID: 70699
           Summary: Add pr70161.c test-case
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: trivial
          Priority: P3
         Component: testsuite
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

The fix for pr70161 needs a testcase.