Bug 1839512 - updated libwebrtc patch stack. r=dbaker,webrtc-reviewers

Also fixes author information for patch:
"Bug 1654112 - Tweak upstream gn files for Firefox build."
This patch had, probably due to previous history editing,
been changed from Dan Minor to stransky.  Now it is
correct, showing Dan Minor as the author.

Differential Revision: https://phabricator.services.mozilla.com/D181582

third_party/libwebrtc/moz-patch-stack/0035.patch

@@ -1,4 +1,4 @@
-From: stransky <stransky@redhat.com>
+From: Dan Minor <dminor@mozilla.com>
 Date: Thu, 5 Nov 2020 07:47:00 +0000
 Subject: Bug 1654112 - Tweak upstream gn files for Firefox build. r=ng
 
@@ -22,12 +22,11 @@ Mercurial Revision: https://hg.mozilla.org/mozilla-central/rev/127ace4d8887f11ab
  modules/desktop_capture/BUILD.gn              | 29 +---------------
  modules/portal/BUILD.gn                       | 24 +++++++++++++
  modules/video_capture/BUILD.gn                | 11 +-----
- modules/video_coding/BUILD.gn                 |  6 ++++
  rtc_base/BUILD.gn                             |  4 ++-
  rtc_base/system/BUILD.gn                      |  2 +-
  test/BUILD.gn                                 | 14 ++++++++
  webrtc.gni                                    | 34 ++++++++++++-------
- 22 files changed, 162 insertions(+), 74 deletions(-)
+ 21 files changed, 156 insertions(+), 74 deletions(-)
  create mode 100644 common_audio/intrin.h
 
 diff --git a/.gn b/.gn
@@ -531,23 +530,6 @@ index b42536db85..aff496cc01 100644
        include_dirs = [
          "/config/external/nspr",
          "/nsprpub/lib/ds",
-diff --git a/modules/video_coding/BUILD.gn b/modules/video_coding/BUILD.gn
-index 8e35299741..166df525c5 100644
---- a/modules/video_coding/BUILD.gn
-+++ b/modules/video_coding/BUILD.gn
-@@ -199,6 +199,12 @@ rtc_library("video_coding") {
-     "video_receiver2.cc",
-     "video_receiver2.h",
-   ]
-+  if (build_with_mozilla) {
-+    sources += [
-+      "event_wrapper.cc",
-+      "event_wrapper.h",
-+    ]
-+  }
- 
-   deps = [
-     ":codec_globals_headers",
 diff --git a/rtc_base/BUILD.gn b/rtc_base/BUILD.gn
 index 0d8bd4f759..7e162cecbb 100644
 --- a/rtc_base/BUILD.gn