This reverts commit a4aa5c60bb.
Does not work outside of gst-build (i.e. validate won't work when used either
installed, in a prefix, or in gst-uninstalled).
Summary:
And rely on our knowledge of the configuration to figure out where the
suppression file has been installed
Reviewers: gdesmott
Differential Revision: http://phabricator.freedesktop.org/D61