* gnu/packages/patches/ilmbase-fix-tests.patch: Adjust for new origin.
* gnu/packages/patches/ilmbase-openexr-pkg-config.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/graphics.scm (ilmbase): Update to 2.4.0.
[source]: Change to GIT-FETCH, as tarballs are no longer provided. Add new
patch.
[build-system]: Change to CMAKE-BUILD-SYSTEM.
[arguments]: Add phase to enter the correct source directory.
* gnu/packages/graphics.scm (openexr): Update to 2.4.0.
[source]: Inherit from ILMBASE, which comes from the same repository.
[build-system]: Change to CMAKE-BUILD-SYSTEM.
[arguments]: Add phase to enter the correct source directory.
* gnu/packages/gstreamer.scm (gst-plugins-bad)[arguments]: Enable C++11.
* gnu/packages/image-processing.scm (opencv)[arguments]: Likewise.
