Upgrade cmake on buildbot builders with cmake < 2.7

16:22 <@dbart> serg: I see a bunch of recent compile failures in
buildbot due to the cmake version being less than
2.7
16:22 <@dbart> serg: should I upgrade the affected build VMs?

16:47 < serg> dbart: yes, I was just going to ask you that. here: on
those .deb distros that ship cmake < 2.7, we stay
with manually installed cmake. build scripts
don't have build-depend on those systems.
16:47 < serg> dbart: on newer distros, build scripts have a
build-depend, so a cmake should be installed from
OS (with apt-get)
16:48 < serg> dbart: and I remember seeing on one of the VMs the build
failed due to lack of the disk space, if you'll
notice it - you'll know what to do
16:48 < serg> dbart: but basically, only those VMs where the build
fails because of the unsatisfied build
dependency, only those need to be fixed