[PATCH v2 2/4] buildman: Write out the build command used

[Simon Glass]

It is sometimes useful to see the exact 'make' command used by buildman
for a commit. Add an output file for this.

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

(no changes since v1)

 tools/buildman/builderthread.py | 13 +++++++++++++
 tools/buildman/buildman.rst     |  8 ++++++++
 tools/buildman/func_test.py     | 13 +++++++++++++
 3 files changed, 34 insertions(+)

Applied to u-boot-dm/next, thanks!