Add 7 new taunts
New sounds:
* Bugger, Drat: Hog damages self only
* Thisoneismine: Crate drop
* Whatthe: Something is going to blow up close to hog
* Solong, Ohdear: Death
* Gonnagetyou: Vow for revenge
Fallback code is added for existing voicepacks
Thisoneismine is not used in Robot because the text in this sound file
is "Threat detected.", which does not make sense.