Don't add ChangeLog entries to ChangeLog-less modules

[Christian Persch <chpe gnome org>]

Hi;

Absence of ChangeLog, po/ChangeLog and help/ChangeLog etc. means that
the module in question does not use changelogs. (For example,
this is the case for epiphany, epiphany-extensions, gucharmap,
gnome-terminal, gnome-games.) However, some translators still add
changelog entries to modules that do not have ChangeLog files, adding
them to po/ChangeLog.pre-X-Y or ChangeLog.old etc. These files are, as
their name already indicates, not to be modified further. Please stop
doing this.

Regards,
	Christian