Change in coreboot[master]: Build system: Make jenkins target to check for changes

[Martin Roth (Code Review)]

Hello Philippe Mathieu-Daudé, build bot (Jenkins),

I'd like you to reexamine a change.  Please visit

https://review.coreboot.org/19035

to look at the new patch set (#2).

Change subject: Build system: Make jenkins target to check for changes
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Build system: Make jenkins target to check for changes

-add --timeless argument to what-jenkins-does builds
- Add jenkins-compare-last makefile target that checks out the previous
commit and rebuilds all platforms, then compares the checksums of
all of the platforms and configs looking for anything that's changed.
- Add timeless & checksum arguments to the what-jenkins-does target
to supply good checksums to compare against.
- The timeless argument was previously being supplied as an environment
variable on the jenkins server.  That can be removed with this change.

Change-Id: Ie603f80c6f2b2a656df22b4a569a0f82a1237636
Signed-off-by: Martin Roth 
---
M Makefile
M Makefile.inc
2 files changed, 26 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/35/19035/2