Ian Wienand d0906ad473 pip-and-virtualenv: handle centos image-based builds
This fixes a regression in I041a141366099093805e6052b1bbf64efd277e1e
where we starting skipping the removal of old files for image-based
builds (confusingly named centos7 rather than centos for historical
reasons).  Fix the check

Change-Id: I74688a9e91d833b5d654056431729bed0585616c
2019-02-07 10:56:29 +11:00
..
2014-07-21 10:15:41 +02:00
2017-06-16 15:58:50 +10:00