gnu: Replace uses of 'libjpeg' with 'libjpeg-turbo'.

gnu: Replace uses of 'libjpeg' with 'libjpeg-turbo'.

* gnu/packages/abiword.scm (abiword)[inputs]: Change from LIBJPEG to
LIBJPEG-TURBO.
* gnu/packages/admin.scm (testdisk)[inputs]: Likewise.
* gnu/packages/algebra.scm (giac)[inputs]: Likewise.
* gnu/packages/animation.scm (synfig)[inputs]: Likewise.
* gnu/packages/astronomy.scm (gnuastro, celestia)[inputs]: Likewise.
* gnu/packages/cdrom.scm (dvdstyler)[inputs]: Likewise.
* gnu/packages/cran.scm (r-jpeg, r-tiff, r-readbitmap)[inputs]: Likewise.
* gnu/packages/cups.scm (cups-filters, hplip)[inputs]: Likewise.
* gnu/packages/display-managers.scm (slim)[inputs]: Likewise.
* gnu/packages/ebook.scm (fbreader)[inputs]: Likewise.
* gnu/packages/emacs.scm (emacs)[inputs]: Likewise.
* gnu/packages/enlightenment.scm (efl)[propagated-inputs]: Likewise.
* gnu/packages/fltk.scm (fltk, ntk)[inputs]: Likewise.
* gnu/packages/fontutils.scm (fontforge)[inputs]: Likewise.
* gnu/packages/freedesktop.scm (weston)[inputs]: Likewise.
* gnu/packages/game-development.scm (sfml, allegro, aseprite, python-pygame,
eureka, ioquake3)[inputs]: Likewise.
* gnu/packages/games.scm (adanaxisgpl, freedroidrpg, irrlicht, minetest,
fizmo, supertuxkart, gzdoom, xmoto, xonotic)[inputs]: Likewise.
* gnu/packages/gd.scm (gd, perl-gd)[inputs]: Likewise.
* gnu/packages/ghostscript.scm (lcms)[inputs]: Likewise.
(ghostscript)[inputs, native-inputs]: Likewise.
* gnu/packages/gimp.scm (gegl, gimp)[inputs]: Likewise.
* gnu/packages/gnome.scm (libgnomeui, eog, tracker-miners, gthumb)[inputs]: Likewise.
* gnu/packages/gnunet.scm (libextractor)[inputs]: Likewise.
* gnu/packages/gnustep.scm (windowmaker)[inputs]: Likewise.
* gnu/packages/graphics.scm (blender, blender-2.79, openimageio,
openscenegraph, openscenegraph-3.4, povray, fgallery)[inputs]: Likewise.
* gnu/packages/graphviz.scm (graphviz)[inputs]: Likewise.
* gnu/packages/gstreamer.scm (gst-plugins-good)[inputs]: Likewise.
* gnu/packages/gtk.scm (gdk-pixbuf)[inputs]: Likewise.
* gnu/packages/image-processing.scm (dcmtk, mia, vtk, opencv, vips, nip2, vxl,
insight-toolkit)[inputs]: Likewise.
* gnu/packages/image-viewers.scm (gpicview, luminance-hdr)[inputs]: Likewise.
* gnu/packages/image.scm (jpegoptim, libtiff, leptonica, imlib2, freeimage,
vigra, libwebp, libmng, jasper, steghide, jp2a)[inputs]: Likewise.
* gnu/packages/imagemagick.scm (imagemagick, graphicsmagick)[inputs]: Likewise.
* gnu/packages/java.scm (icedtea-6, icedtea-7, openjdk9, openjdk11,
openjdk12)[inputs]: Likewise.
* gnu/packages/kde-frameworks.scm (khtml)[inputs]: Likewise.
* gnu/packages/kodi.scm (kodi)[inputs]: Likewise.
* gnu/packages/machine-learning.scm (dlib, tensorflow)[inputs]: Likewise.
* gnu/packages/mate.scm (atril, eom)[inputs]: Likewise.
* gnu/packages/maths.scm (hdf4, hdf-java, hdf-eos2, netcdf)[inputs]: Likewise.
* gnu/packages/netpbm.scm (netpbm)[inputs]: Likewise.
* gnu/packages/pdf.scm (zathura-pdf-mupdf, podofo, mupdf, fbida)[inputs]: Likewise.
* gnu/packages/photo.scm (libraw, libpano13, enblend-enfuse, darktable, hugin,
rawtherapee)[inputs]: Likewise.
* gnu/packages/prolog.scm (swi-prolog)[native-inputs]: Likewise.
* gnu/packages/python-xyz.scm (python-hdf4, python-pillow)[inputs]: Likewise.
* gnu/packages/qt.scm (qtbase, qtwebkit)[inputs]: Likewise.
* gnu/packages/rdesktop.scm (freerdp)[inputs]: Likewise.
* gnu/packages/scanner.scm (sane-backends, xsane)[inputs]: Likewise.
* gnu/packages/scheme.scm (racket)[inputs]: Likewise.
* gnu/packages/scribus.scm (scribus)[inputs]: Likewise.
* gnu/packages/sdl.scm (sdl-image)[propagated-inputs]: Likewise.
(guile-sdl)[native-inputs]: Likewise.
* gnu/packages/spice.scm (spice-gtk)[inputs]: Likewise.
* gnu/packages/statistics.scm (r-with-tests)[inputs]: Likewise.
* gnu/packages/tcl.scm (perl-tk)[inputs]: Likewise.
* gnu/packages/upnp.scm (readymedia)[inputs]: Likewise.
* gnu/packages/video.scm (mplayer, mpv, v4l-utils, motion)[inputs]: Likewise.
* gnu/packages/web-browsers.scm (dillo, links)[inputs]: Likewise.
* gnu/packages/web.scm (netsurf)[inputs]: Likewise.
* gnu/packages/webkit.scm (webkitgtk)[inputs]: Likewise.
* gnu/packages/wine.scm (wine)[inputs]: Likewise.
* gnu/packages/wv.scm (wv)[inputs]: Likewise.
* gnu/packages/wxwidgets.scm (wxwidgets, wxwidgets-2)[inputs]: Likewise.
* gnu/packages/xdisorg.scm (xscreensaver)[inputs]: Likewise.
* gnu/packages/xfce.scm (tumbler)[inputs]: Likewise.
* gnu/packages/xfig.scm (xfig, transfig)[inputs]: Likewise.
* gnu/packages/xorg.scm (xpra)[inputs]: Likewise.