Fail `build.sh` if any command in it fails #4271

Job	Run time
Diagnostic export (macos-latest, linked)	1m 35s
Diagnostic export (ubuntu-latest, nightly-latest)	58s
Diagnostic export (ubuntu-latest, linked)	1m 9s
Diagnostic export (macos-latest, nightly-latest)	1m 45s
Diagnostic export (windows-latest, nightly-latest)	3m 52s
Diagnostic export (windows-latest, linked)	3m 40s
	12m 59s

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