po/Makefile.in.in overrides SHELL to /bin/sh

[Scott James Remnant]

The po/Makefile.in.in included with gettext explicitly sets SHELL
to /bin/sh, instead of @address@hidden

It then calls various tools with this hardcoded shell, when some of
those tools are generated by Autoconf/m4sh with another shell in mind.

Absolutely worst is calling config.status with /bin/sh, as that can
result in other tools being regenerated improperly.

(We see this attempting to reconfigure GTK+ - the libtool script becomes
 mangled as /bin/sh--which is dash in Ubuntu--turns the \1 in the sed
 scripts to ^A--the config.status was written with SHELL=/bin/bash in
 mind).

Scott
-- 
Scott James Remnant
address@hidden

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