Add few new stubs seen from Dragon Ball Z Tenkaichi Tag Team

@unknownbrackets , I added sceKernelExtendThreadStack , please take a look from you side if u can put in something .Thanks 

New stubs list

sceKernelExtendThreadStack
sceKernelStopUnloadSelfModuleWithStatus
sceAtracLowLevelDecode
sceAtracLowLevelInitDecoder