waf:lib/replace change detection of gettext
convert this to an automatic check: if no option is given, try to find gettext
and if found, use it
if user has specified --with-gettext, then bail out if it could not be found
in case of --without-gettext, skip all gettext related configure checks
Bug: https://bugzilla.samba.org/show_bug.cgi?id=9911
Signed-off-by: Christian Ambach <ambi@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit
a83f491810d34cc8b6eb4b0f40bbbb1440e0f84d)