uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/applications/misc/octoprint/ffmpeg-path.patch

@@ -0,0 +1,41 @@
+diff --git a/src/octoprint/plugins/corewizard/templates/corewizard_webcam_wizard.jinja2 b/src/octoprint/plugins/corewizard/templates/corewizard_webcam_wizard.jinja2
+index 79342dcd7..6165a4119 100644
+--- a/src/octoprint/plugins/corewizard/templates/corewizard_webcam_wizard.jinja2
++++ b/src/octoprint/plugins/corewizard/templates/corewizard_webcam_wizard.jinja2
+@@ -29,14 +29,3 @@
+     {% include "snippets/settings/webcam/webcamStreamUrl.jinja2" %}
+     {% include "snippets/settings/webcam/webcamSnapshotUrl.jinja2" %}
+ </form>
+-
+-<h4>{{ _('Timelapse Recordings') }}</h4>
+-
+-{% trans %}<p>
+-    To render the snapshots into timelapse recordings, OctoPrint also needs to
+-    know the correct <strong>path to FFMPEG</strong>.
+-</p>{% endtrans %}
+-
+-<form class="form-horizontal" data-bind="with: settingsViewModel" onsubmit="return false;">
+-    {% include "snippets/settings/webcam/ffmpegPath.jinja2" %}
+-</form>
+diff --git a/src/octoprint/server/api/settings.py b/src/octoprint/server/api/settings.py
+index c3e6cea10..ced2f8fa0 100644
+--- a/src/octoprint/server/api/settings.py
++++ b/src/octoprint/server/api/settings.py
+@@ -130,7 +130,7 @@ def getSettings():
+             "snapshotUrl": s.get(["webcam", "snapshot"]),
+             "snapshotTimeout": s.getInt(["webcam", "snapshotTimeout"]),
+             "snapshotSslValidation": s.getBoolean(["webcam", "snapshotSslValidation"]),
+-            "ffmpegPath": s.get(["webcam", "ffmpeg"]),
++            "ffmpegPath": "@ffmpeg@",
+             "ffmpegCommandline": s.get(["webcam", "ffmpegCommandline"]),
+             "bitrate": s.get(["webcam", "bitrate"]),
+             "ffmpegThreads": s.get(["webcam", "ffmpegThreads"]),
+@@ -548,8 +548,6 @@ def _saveSettings(data):
+                 ["webcam", "snapshotSslValidation"],
+                 data["webcam"]["snapshotSslValidation"],
+             )
+-        if "ffmpegPath" in data["webcam"]:
+-            s.set(["webcam", "ffmpeg"], data["webcam"]["ffmpegPath"])
+         if "ffmpegCommandline" in data["webcam"]:
+             commandline = data["webcam"]["ffmpegCommandline"]
+             if not all(