The filter_text function in scripts/functions.sh in version 5.3.3 had
commented out a "rm" command, probably for debugging purposes. This
caused temporary files to persist in /tmp when the bc program had been
built.
This commit fixes the build process with no change of the resulting
artefacts.
(cherry picked from commit 1576f66712876ee8b0fcc8b35fb062e1813b4fc0)
MFC after: 3 days
f6ed05f123