Implement jpegsrc.v8b.tar.gz LINUX

[ChrisW67]

The configure script defaults to automatic detection of the presence of a system JPEG library. If you have the -I and -L options set correctly then it should find yours in preference to the vendor's.

If you really must set it manually then:

• Clearly the first option is of no use.
• The second one will ignore the system JPEG library and also your JPEG library and use whatever is bundled inside Qt (v8 of the library in 4.7.0).
• That leaves only one option.