Commit bdfe6e44 authored by Jan Schmidt's avatar Jan Schmidt Committed by GStreamer Merge Bot

tests: fix meson test env setup to make sure we use the right gst-plugin-scanner

This is the same fix that was applied in gst-plugins-good in
gst-plugins-good!603
and fixes the testsuite running in gst-build.

Part-of: <!219>
parent 6046a515
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