Add the ISO8859-14 encoding
Source: https://en.wikipedia.org/wiki/ISO/IEC_8859-14
This allows legacy applications (xcalc for instance) to work without the: "Warning: missing charsets in String to FontSet conversion" message on systems with only ISO8859-1 and UTF-8 encoded fonts installed.
Signed-off-by: Matthieu Herrb matthieu@herrb.eu