[PATCH v2 3/4] buildman: Support disabling LTO

[Simon Glass]

This cuts down build performance considerably and is not always needed,
when checking for build errors, etc.

Add a flag to disable it.

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

(no changes since v1)

 tools/buildman/builder.py       |  5 ++++-
 tools/buildman/builderthread.py |  2 ++
 tools/buildman/buildman.rst     | 14 ++++++++++++++
 tools/buildman/cmdline.py       |  2 ++
 tools/buildman/control.py       |  2 +-
 tools/buildman/func_test.py     | 25 +++++++++++++++++++++----
 6 files changed, 44 insertions(+), 6 deletions(-)

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