Create function to test hidden files/dirs.
Create function to test hidden files/dirs.

Change-Id: I67e8d69fc85dfe58e4f127007c73f6888deff3e0

joyxu/kernelci-backend,kernelci/kernelci-backend,joyxu/kernelci-backend,joyxu/kernelci-backend,kernelci/kernelci-backend