Fix extension build on linux about slicerjupyter HOT 5 CLOSED

@jcfr @sjh26 could you please add this package to the build system? There are other packaging issues on linux, which I can take care of, but I don't have any way to fix the build right now. I would like to make the mybinder image refresh automatically every few days, and the simplest way to do that is to use the existing SlicerPreview packages.

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For linux, it is a matter of updating this file: Docker/qt5-centos7/Dockerfile. See Slicer/SlicerBuildEnvironment#9

That said, since libuuid-devel provides the shared library libuuid.so, should we package it or expect it to be available on every target system ? Installing libuuid could also be a prerequisite on linux.

$ sudo repoquery -l libuuid-devel
/usr/include/uuid
/usr/include/uuid/uuid.h
/usr/lib/libuuid.so
/usr/lib/pkgconfig/uuid.pc
/usr/share/doc/libuuid-devel-2.23.2
/usr/share/doc/libuuid-devel-2.23.2/COPYING
/usr/share/man/man3/uuid.3.gz
[...]
/usr/include/uuid
/usr/include/uuid/uuid.h
/usr/lib64/libuuid.so
/usr/lib64/pkgconfig/uuid.pc
/usr/share/doc/libuuid-devel-2.23.2
/usr/share/doc/libuuid-devel-2.23.2/COPYING
/usr/share/man/man3/uuid.3.gz
[...]

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If we make it a prerequisite, we should put it on the main Slicer dep list rather than needing another specific step for SlicerJupyter.

Considering it is hard to get software installed on HPC-like systems, I would lean a bit towards packaging. It only links libc so it should be safe enough to redistribute (at least as safe as packaging libssl).

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Looks like this is fixed?

http://slicer.cdash.org/index.php?project=SlicerPreview&date=2018-11-18&filtercount=1&showfilters=1&field1=label&compare1=63&value1=SlicerJupyter

(today's build failed but looks like it was just a network issue)

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Fixed.

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