Convert `Localizable.strings` file encoding to such encoding.

localizable-encoding.sh

#!/bin/sh

ENCODING="utf-8"

for file in *.lproj/Localizable.strings; do
    charset=`file -I "$file" | sed 's/.*charset=\(.*\)/\1/'`
    if ! [[ "$charset" =~ "$ENCODING" ]]
    then
        output="$file.tmp"
        iconv -f "$charset" -t "$ENCODING" "$file" > "$output" &&
        rm "$file" &&
        mv "$output" "$file"
    fi
done