Add all missing languages to OpenTM2 languages.xml

OpenTM2 is used as Translation Memory back-end in translate5.

It needs to support the same languages, that are supported in translate5 as selectable languages for a task.

The information in OpenTM2 is kept in the languages.xml file.

So all missing languages need to be added to this file.

For each new language a tag group like the following needs to be added with adjusted values

<language>
<name>Arabic(SA)</name>
<cpASCII>864</cpASCII><!-- not needed for translate5 integration - if used natively with OpenTM2 GUI client, please provide the correct value for this language here -->
<cpANSI>1256</cpANSI><!-- not needed for translate5 integration - if used natively with OpenTM2 GUI client, please provide the correct value for this language here -->
<cpName>ISO-8859-6</cpName><!-- not needed for translate5 integration - if used natively with OpenTM2 GUI client, please provide the correct value for this language here -->
<iso>ar-SA</iso>
<icu>ar-SA</icu>
<preferred>no</preferred>
<group>Arabic</group>
<isSourceLanguage>yes</isSourceLanguage>
<isTargetLanguage>yes</isTargetLanguage>
<comments>-SA = Saudi-Arabia</comments>
</language>