package/jpeg-turbo: bump to version 2.0.6

Update hash of README.ijg (URLs updated and Usenet info removed with
https://github.com/libjpeg-turbo/libjpeg-turbo/commit/26e3aedbe569329d8ab005bad5481bcbd1f43ac8)

https://sourceforge.net/projects/libjpeg-turbo/files/2.0.6

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2 files changed