enblend-enfuse: workaround vigra bug where arithmetic coded JPEG is always created with libjpeg-turbo

This udpate fixes the following issue for enblend-enfuse:
- bnc#786566: workaround vigra bug where arithmetic coded JPEG is always created with libjpeg-turbo

Fixed bugs
bnc#786566
Hugin save result in incorrect JPEG format
Selected Binaries
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