This change aligns disk usage measurements of the eSDK test with the old
build-perf-test.sh script. And thus, also makes the results between the
old and the new script comparable.
(From OE-Core rev: dadb84936b3672dcf07e5ab8226158136762801f)
Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>