Merge #15549: gitian: Improve error handling

32da92bdf6 gitian: Improve error handling (Wladimir J. van der Laan)

Pull request description:

  Improve error handling in gitian builds:

  - Set fail-on-error and pipefail flag, this causes a command to fail when either of the pipe stages fails, not only when the last of the stages fails, so this improves error detection.
  - Also use `xargs` instead of `find -exec`, because `find` will not propagate errors in the executed command, but `xargs` will.

  This will avoid some issues like #15541 where non-determinism is silently introduced due to errors caused by environment conditions (such as lack of disk space in that case).

Tree-SHA512: d5d3f22ce2d04a75e5c25e935744327c3adc704c2d303133f2918113573a564dff3d3243d5569a2b93ee7eb0e97f8e1b1ba81767e966af9015ea711a14091035

contrib/devtools/split-debug.sh.in

@@ -1,5 +1,5 @@
 #!/bin/sh
-
+set -e
 if [ $# -ne 3 ];
     then echo "usage: $0 <input> <stripped-binary> <debug-binary>"
 fi