Update buildroot to 2021.02.6 (#1607)

* Update buildroot to 2021.02.6

* Renew buildroot-patches

This makes sure that docker-proxy gets bumped to the latest Docker version
as well.

buildroot/CHANGES

@@ -1,3 +1,35 @@
+2021.02.6, released October 11, 2021
+
+	Important / security related fixes.
+
+	gdbinit: Mark the sysroot as a "safe path" before configuring
+	it, so pretty printers work correctly without having to pass
+	-ix to gdb
+
+	Updated/fixed packages: alsa-lib, apache,
+	arm-trusted-firmware, atftp, bind, botan, cryptopp, dash,
+	dc3dd, docker-cli, docker-containerd, docker-engine, dovecot,
+	erlang, fetchmail, gdb, ghostscript, go, gst-omx,
+	gst1-devtools, gst1-interpipe, gst1-libav, gst1-plugins-bad,
+	gst1-plugins-base, gst1-plugins-good, gst1-plugins-ugly,
+	gst1-python, gst1-rtsp-server, gst1-vaapi, gstreamer1,
+	gstreamer1-editing-services, kodi-pvr-octonet, libcurl,
+	libkrb5, libressl, libsndfile, libyang, lxc, lynx, mesa3d,
+	micropython, minicom, mono, mtr, mv-ddr-marvell, net-tools,
+	nmap, nodejs, ntfs-3g, openjdk, openjdk-bin, openldap,
+	openssh, php, python-aioconsole, python-cffi, python-dateutil,
+	python-django, python-pip, python-texttable, python-urllib3,
+	python-webob, qt5location, redis, refpolicy, ripgrep, runc,
+	sispmctl, squid, strongswan, supervisor, syslinux, tinycbor,
+	trace-cmd, uboot-tools, uclibc, wavemon, wireless-regdb, xen,
+	xserver_xorg-server
+
+	Issues resolved (http://bugs.uclibc.org):
+
+	#14206: Kodi: even when not enabled, forcefully selects libevdev..
+	#14211: libffi-3.3.tar.gz repacked
+	#14221: mv-ddr-marvell fails license validation
+
 2021.02.5, released September 15th, 2021
 
 	Important / security related fixes.