build: Add more debugging output when -v -v is used.
rpm: If rpm < 4.11, don't include "epoch:" in package names.

Old RPM [RHEL 6 in this case] didn't match packages if epoch appeared
in the package names on the command line.

The RPM commit was:

  commit fa428c5bc143d2d7ac073654b602c27d80f96559
  Author: Ales Kozumplik
  Date:   Fri Nov 11 10:38:49 2011 +0100

    Recognize "<epoch>:" as a part of a label (ticket #117)

    - for instance this works now:
      $ rpm -q perl-4:5.14.1-188.fc16.x86_64
      perl-5.14.1-188.fc16.x86_64

which appeared first in rpm-4.11.0-alpha.
tests: Test packages with epoch > 0 install correctly.

Regression test of the previous commit.

Also test on RHEL.