[PATCH v2 05/28] buildman: Split out testOutput() into separate functions

[sjg at google.com]

We want to add a few more tests similar to testOutput(). Split its logic
into a function which runs buildman to get the output and another which
checks the output. This will make it easier to reuse the code.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v2: None

 tools/buildman/test.py | 34 ++++++++++++++++++++++++++++------
 1 file changed, 28 insertions(+), 6 deletions(-)

Applied to u-boot-dm, thanks!