chromeos-config: Rename AudioFile to BaseFile

We plan to use this object for things other than audio. For example it can
be used for thermal files. Rename it to 'BaseFile' to reflect that.

BUG=chromium:769575
TEST=PYTHONPATH=~/cosarm python cros_config_host_py/libcros_config_host_unittest.py

Change-Id: I070ba81cd661eb77f08fab222b3e0d6eb235b3d2
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/729134
Reviewed-by: Jason Clinton <jclinton@chromium.org>
3 files changed