Bug#739989: debian-installer-utils: log-output change breaks speech synthesis

[Cyril Brulebois <kibi@debian.org>]

Source: debian-installer-utils
Version: 1.103
Severity: serious
Tags: d-i
Justification: breaks speech synthesis

Hi Colin,

the change below breaks speech synthesis, as reported here:
  https://lists.debian.org/debian-accessibility/2014/02/msg00093.html

and suspected here:
  https://lists.debian.org/debian-accessibility/2014/02/msg00102.html

I've checked that building d-i against testing udebs lets me reproduced
this issue, and that adding d-i-utils' binaries to localudebs after
having reverted this change fixes speech synthesis.

commit 9c6685364a56697ea9c590e1bc93a73ade88b679
Author: Colin Watson <cjwatson@debian.org>
Date:   Fri Feb 7 17:07:46 2014 +0000

    log-output: Always install a no-op SIGCHLD handler
    
    This copes with the case where the subsidiary process starts a daemon which
    does not fully disconnect its standard file descriptors (LP: #1021293).
    
    See also the changelog for 1.46.

(http://anonscm.debian.org/gitweb/?p=d-i/debian-installer-utils.git;a=commit;h=9c6685364a56697ea9c590e1bc93a73ade88b679)

Can you please have a look? Worst case I could revert and upload with
urgency=high (the package is in testing now), but having a proper fix
would be nice if it's only a matter of days.

Mraw,
KiBi.