Reapply "define and export LOG_TEST_FILENAME"

Commit f75daf272507 ("Sync static check scripts with internal CI")
inadvertently overwrote the changes done in commit 34382ea57904.

Change-Id: I3df6896326741f9e5fff826b1c91cd15ba2fca9b
Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
1 file changed