* gnu/packages/pdf.scm (zathura-pdf-mupdf)[inputs]: Add mujs.
[arguments]: Pass 'link-external' to the configure flags. Patch 'meson.build'
to include mujs as 'build_dependencies'.
* gnu/packages/patches/poppler-CVE-2018-19149.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/pdf.scm (poppler)[replacement]: New field.
(poppler/fixed): New variable.
(poppler-qt4, poppler-qt5): Use package/inherit.
* gnu/packages/pdf.scm (mupdf): Update to 1.14.
[source]: Don't remove all the bundled libraries.
[arguments]: Add 'configure-flags to use system libraries.
* gnu/packages/pdf.scm (zathura-pdf-poppler): Update to 0.2.9.
[build-system]: Switch to the Meson build system.
[arguments]: Trim accordingly. Add a new ‘patch-plugin-directory’
phase.
* gnu/packages/pdf.scm (zathura-pdf-mupdf): Update to 0.3.3.
[build-system]: Switch to the Meson build system.
[arguments]: Trim accordingly. Add a new ‘patch-plugin-directory’
phase.
* gnu/packages/pdf.scm (zathura-djvu): Update to 0.2.8.
[build-system]: Switch to the Meson build system.
[arguments]: Trim accordingly. Add a new ‘patch-plugin-directory’
phase.