Revision 554893

Add set pipefail in most framework scripts.

set pipefail changes the pipeline return status from being the return
status of the last command to the last non 0 exit status of any command
in the pipeline.  This is needed to make sure all the commands in a
pipeline did actually return a non 0 status and not only the last one.

PR:		250723
Exp-run by:	antoine
Reviewed by:	bapt
Approved by:	bapt
Differential Revision:	https://reviews.freebsd.org/D27007