constants: fix _TEST_LIB_PATH setting

The variable name implied this was the lib/ subdir, but in reality it
is the lib/constants.py file.  The only user of it previously worked
around this by using os.path.dirname instead of fixing its meaning.

BUG=chromium:937944
TEST=precq passes

Change-Id: I4cecdc7d800f5964b14ab6a54122be56cc78d911
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/1499706
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed