K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2017-09-12T00:44:16.799864Z
K 7
svn:log
V 380
make-memstick.sh: use 'set -e' to abort if any step fails

Also remove the now-redundant error handling that was only for makefs.

This script was run on an older FreeBSD host that lacked efi-on-mbr
support in makefs. A warning was emitted on the console (from makefs)
but the script continued running and exited with 0.

MFC of r308171 (arm64) and r323178 (other architectures).

END