Dependencies `libjpeg` need to be changed to `libjpeg.so`/ `libjpeg-turbo`.

[dreirund]

### depends needs to be changed (libjpeg):

Can you please change

• dependendy libjpeg to libjpeg-turbo (any maybe existing make dependency libjpeg needs also to be changed to libjpeg-turbo),
  or maybe more elaboreate,
• dependencies libjpeg to libjpeg.so AND add make dependency libjpeg-turbo?

Reason: Arch Linux does not have libjpeg anymore, and libjpeg-turbo stopped to declare libjpeg in it's provides array.

Regards and thanks for maintaining!