Catch all errors in for and while loops in makefiles. Don't ignore any

Peter Eisentraut <peter_e@gmx.net>

Commit: 8c87cc370f427515b4aa9b03e64a8878de4b6a22
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2008-03-18T16:24:50Z
Releases: 8.4.0
Catch all errors in for and while loops in makefiles.  Don't ignore any
errors in any commands, including in various clean targets that have so far
been handled inconsistently.  make -i is available to ignore all errors in
a consistent and official way.

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