gnu: icecat: Update to 52.0.2-gnu1; add fixes from ESR 52.1.

gnu: icecat: Update to 52.0.2-gnu1; add fixes from ESR 52.1.

* gnu/packages/gnuzilla.scm (icecat): Update to 52.0.2-gnu1.
[source]: Remove all patches except "icecat-avoid-bundled-libraries.patch".
Add selected fixes from the upstream mozilla-esr52 repository, up to 52.1.
Remove "dom/devicestorage" in the snippet.
[inputs]: Remove gstreamer and gst-plugins-base.  Add ffmpeg and gtk+3.  Move
yasm to native-inputs.
[native-inputs]: Add autoconf-2.13 and yasm.
[arguments]: In configure-flags, remove the following switches which are no
longer accepted: --enable-{pango,svg,canvas,mathml,gstreamer=1.0} and
"--disable-gnomevfs".  Use "--enable-default-toolkit=cairo-gtk3" to switch to
Gtk+3.  Remove the 'remove-h264parse-from-blacklist' phase.  Adapt the
'arrange-to-link-libxul-with-libraries-it-might-dlopen' phase as needed.  In
the 'configure' phase, set the AUTOCONF environment variable.
(mozilla-patch): Update the URL pattern to fetch from the mozilla-esr52
repository.
* gnu/packages/patches/icecat-avoid-bundled-libraries.patch: Adapt to mozilla-esr52.
* gnu/packages/patches/icecat-binutils.patch: Remove file.
* gnu/packages/patches/icecat-bug-1299500-pt10.patch: New file.
* gnu/local.mk (dist_patch_DATA): Remove "icecat-binutils.patch".
Add "icecat-bug-1299500-pt10.patch".