SI-8893 Test case to show that tailrec continues to work
SI-8893 Test case to show that tailrec continues to work

As suggested during code review, this test checks that
the tailcalls phase recurses appropriately below a method
that doesn and does not itself tail call. The test case is
based on the pattern of code that to trigger super-linear
performance in this transform.

shimib/scala,slothspot/scala,felixmulder/scala,slothspot/scala,martijnhoekstra/scala,jvican/scala,jvican/scala,scala/scala,felixmulder/scala,jvican/scala,shimib/scala,slothspot/scala,lrytz/scala,lrytz/scala,felixmulder/scala,shimib/scala,shimib/scala,martijnhoekstra/scala,felixmulder/scala,felixmulder/scala,scala/scala,jvican/scala,martijnhoekstra/scala,shimib/scala,lrytz/scala,scala/scala,jvican/scala,martijnhoekstra/scala,lrytz/scala,jvican/scala,scala/scala,slothspot/scala,felixmulder/scala,slothspot/scala,shimib/scala,lrytz/scala,martijnhoekstra/scala,felixmulder/scala,martijnhoekstra/scala,scala/scala,jvican/scala,slothspot/scala,lrytz/scala,slothspot/scala,scala/scala