Citadel: rebuild bottles for tinyxml2

[scpeters]

Part of #2504.

Pull request commits created with the following command:

for f in $(grep -L '^ *bottle do' $(grep -rnI 'depend.*"[is][gd][nf]' ignition-citadel.rb | sed -e 's@.* "@@' -e 's@"@.rb@'))
do
    brew bump-revision --message="rebuild bottle" $f
done
brew bump-revision ignition-citadel --message="rebuild bottle"

[scpeters]

build bottle

[scpeters]

I forgot [email protected]; I'll add that revision bump and rebuild

[scpeters]

build bottle