gnu: Rename openexr to openexr-2.
This is done so the OpenEXR package can be upgraded to version 3 in a
later commit.
* gnu/packages/graphics.scm (openexr): Rename to ...
(openexr-2): ... new variable.
(blender, blender-2.79, openimageio, povray)[inputs]: Adjust accordingly.
(ctl)[propagated-inputs]: Likewise.
* gnu/packages/animation.scm (synfig)[propagated-inputs]: Likewise.
* gnu/packages/gimp.scm (gegl, gimp)[inputs]: Likewise.
* gnu/packages/gstreamer.scm (gst-plugins-bad)[inputs]: Likewise.
* gnu/packages/image-processing.scm (mia, opencolorio, opencv, vips, gmic,
nip2)[inputs]: Likewise.
* gnu/packages/image-viewers.scm (luminance-hdr)[inputs]: Likewise.
* gnu/packages/image.scm (freeimage, vigra, devil)[inputs]: Likewise.
* gnu/packages/kde-frameworks.scm (kimageformats)[inputs]: Likewise.
* gnu/packages/kde.scm (krita)[inputs]: Likewise.
* gnu/packages/photo.scm (enblend-enfuse, darktable, hugin)[inputs]: Likewise.
Signed-off-by: Leo Famulari <leo@famulari.name>
d71336b2e3