The test writes to the disk and means the space used changes. If this
crosses a number boundary, the heading spacing can change causing a test
failure. This was triggered by a recent gcc upgrade.
Add a fix for this which has been shared with upstream.
(From OE-Core rev: ca6f0d81fc7d5e53d216e5131724e826369fd4ae)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>