Patch merged into coreboot/master: abuild: Don't keep around old junit reports

the following patch was just integrated into master:
commit 5ab5a39d2ed0ea28347218ad5e129a7c8244012c
Author: Patrick Georgi 
Date:   Sat Oct 31 08:53:30 2015 +0100

abuild: Don't keep around old junit reports

junit reports were kept around (and appended to) in some cases, leading
    to duplicate reports on jenkins.
    Drop old per-mainboard reports before building said boards, and do the
    same for the tools (reported thrice).

Change-Id: I74a035587bbf917dca85ba6fc74621c583efe9a2
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/12280
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/12280 for details.

-gerrit