bug#17721: sh-mode indentation of {} or () inside do or if

[Glenn Morris <rgm@gnu.org>]

Package: emacs
Version: 24.3.91

emacs -Q foo.sh

for foo in bar; do
    [ -e $foo ] && {
        echo t
    }
done


The above is how 24.3 indents it. 24.3.91 does the following:

for foo in bar; do
    [ -e $foo ] && {
    echo t
}
done


Same issue with if...fi rather than do...done,
and with () rather than {}.