Includes fixes for CVE-2018-18500, CVE-2018-18501, and CVE-2018-18505.
* gnu/packages/gnuzilla.scm (icecat): Update to 60.5.0-guix1.
[version]: Use %icecat-version.
[source]: Inherit from 'icecat-source'. Remove obsolete patches.
* gnu/packages/patches/icecat-avoid-bundled-libraries.patch,
gnu/packages/patches/icecat-use-system-graphite2+harfbuzz.patch,
gnu/packages/patches/icecat-use-system-media-libs.patch: Adapt to 60.5.0.
* gnu/packages/patches/icecat-use-system-media-libs.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/patches/icecat-avoid-bundled-libraries.patch: Add
another hunk to enable removal of libevent.
* gnu/packages/gnuzilla.scm (icecat)[source]: Add patch. In the snippet, add
libevent, libogg, libvorbis, and libtremor to the list of bundled libraries to
remove. Add a comment regarding theora. Remove comments regarding unbundling
cairo, which is no longer supported.
[inputs]: Add libevent, libogg, and libvorbis.
[arguments]: Add --with-system-{libevent,ogg,vorbis} to configure flags.
Add custom bootstrap phase. Add comments.