- fix disk usage monitoring
- try to stop background build script monitor in a clean way
- do not collect statistics by default, usually only interessting for obs workers
- fix swapon call when no initrd is used (current armv7l kvm case)
- fix logic around statistics switch
- wipe old blocklist from former build on starting a new build
- use explicit test command in string compare
- run background monitor only when statistics are enabled
- kvm on armv7l support (by Alexander Graf)
- export times as part of build statistics
hack to workaround missing RTC on arm
detect xz/lzma support in rpm5

rpm5 doesn't use PayloadIsLzma, but rather has _lzma in "rpm --showrc".
Same with PayloadIsXz / _xz.

So we check for both with egrep.

The fix was tested with rpm(4) and rpm5 on Arch Linux,
where the "rpm" package is rpm5 and "rpm-org" is rpm(4).
Merge pull request #37 from JonnyJD/_lzma

detect xz/lzma support in rpm5
icecream's symlinks are installed to /usr/lib/icecream/bin.

https://github.com/icecc/icecream/blob/master/client/Makefile.am
- fix mount options for ext2
use rpmdb --initdb, not rpm --initdb

the latter is deprecated for a while already and the new one is pretty compatible