zephyr: zmake: remove . and .. from file names in BuildConfig test
zephyr: zmake: remove . and .. from file names in BuildConfig test

. and .. are special names for the current and parent directories,
respectively.  Thus, we should not use these names when formulating
filenames for testing.

BUG=chromium:1176487
BRANCH=none
TEST=zmake testall

Signed-off-by: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>
Change-Id: I2f16cb960878aa8a61f77ca1d074e0bac59bca3d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2685403
Commit-Queue: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>
Reviewed-by: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec