Mark some more functions as pg_attribute_noreturn().

Tom Lane <tgl@sss.pgh.pa.us>

Commit: 0772c152b9bd02baeca6920c3371fce95e8f13dc
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2017-11-28T01:56:46Z
Releases: 11.0
Mark some more functions as pg_attribute_noreturn().

Doing this suppresses Coverity warnings and might allow improved
code in some cases.  The prospects of that are not so bright as
to warrant back-patching, though.

Michael Paquier, per Coverity

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