diff-filterer now creating sampleFailure dir
diff-filterer now creating sampleFailure dir

Bug: 132727976
Test: run diff-filterer.py, notice sampleFailure dir gets created

Change-Id: Ifa1da7f08798b5555f5592363f6156c4c5ae336e

AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx