check_have_symbols.sh: remove pipefail shell option

There is only one pipeline, with two commands, in the script and the
receiving awk script is carefully written to produce a correct exit
status for any situation.

For that reason pipefail was already redundant.  More than that,
pipefail was actually harmful because the awk script would terminate
early upon detecting success.  Because of that, readelf could get
SIGPIPE and terminate with non-zero status.  "Thanks" to pipefail the
whole pipeline would have non-zero exit status well.

The issue manifested itself as sporadic failures of the script during
bulk poudriere builds.

Discussed with:	bapt

0 files changed, 0 insertions, 0 deletions