accessibility/speech-dispatcher: update to 0.11.2

Changelog:

• Fix loading xx-yy locales.
• Various memory leaks fixes.
• Add mimic3 configuration file.
• pico: Fix setting language vs voice.
• Make sure that modules report a list of voices.
• Update CLDR to version 41, symbols from NVDA and orca.
• Allow building without ltdl.
• Re-enable SSML in espeak-ng-mbrola module.