Bump buildroot to 2020.11-rc1 (#985)

* Update buildroot-patches for 2020.11-rc1 buildroot

* Update buildroot to 2020.11-rc1

Signed-off-by: Stefan Agner <stefan@agner.ch>

* Don't rely on sfdisk --list-free output

The --list-free (-F) argument does not allow machine readable mode. And
it seems that the output format changes over time (different spacing,
using size postfixes instead of raw blocks).

Use sfdisk json output and calculate free partition space ourselfs. This
works for 2.35 and 2.36 and is more robust since we rely on output which
is meant for scripts to parse.

* Migrate defconfigs for Buildroot 2020.11-rc1

In particular, rename BR2_TARGET_UBOOT_BOOT_SCRIPT(_SOURCE) to
BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT(_SOURCE).

* Rebase/remove systemd patches for systemd 246

* Drop apparmor/libapparmor from buildroot-external

* hassos-persists: use /run as directory for lockfiles

The U-Boot tools use /var/lock by default which is not created any more
by systemd by default (it is under tmpfiles legacy.conf, which we no
longer install).

* Disable systemd-update-done.service

The service is not suited for pure read-only systems. In particular the
service needs to be able to write a file in /etc and /var. Remove the
service. Note: This is a static service and cannot be removed using
systemd-preset.

* Disable apparmor.service for now

The service loads all default profiles. Some might actually cause
problems. E.g. the profile for ping seems not to match our setup for
/etc/resolv.conf:
[85503.634653] audit: type=1400 audit(1605286002.684:236): apparmor="DENIED" operation="open" profile="ping" name="/run/resolv.conf" pid=27585 comm="ping" requested_mask="r" denied_mask="r" fsuid=0 ouid=0

buildroot/package/poco/0002-Add-support-for-m68000-1856.patch

@@ -1,4 +1,4 @@
-From e49753f7654dc62087e47731832d5992cc4d194e Mon Sep 17 00:00:00 2001
+From 221e308ad452035f4c1dc25e194f817a30f38f7b Mon Sep 17 00:00:00 2001
 From: Jochen Sprickerhof <github@jochen.sprickerhof.de>
 Date: Wed, 23 Aug 2017 16:50:51 +0200
 Subject: [PATCH] Add support for m68000 (#1856)
@@ -8,16 +8,18 @@ Originally taken from
 https://github.com/google/double-conversion/commit/da11179623145f53b204105a93b8bbca431141da
 
 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+[Julien: rebased on version 1.10.1]
+Signed-off-by: Julien Olivain <juju@cotds.org>
 ---
  Foundation/src/utils.h | 2 ++
  1 file changed, 2 insertions(+)
 
 diff --git a/Foundation/src/utils.h b/Foundation/src/utils.h
-index 69cea1aca..a7bda0171 100644
+index c87cee13c..e891c0f10 100644
 --- a/Foundation/src/utils.h
 +++ b/Foundation/src/utils.h
-@@ -65,6 +65,8 @@
-     defined(__AARCH64EL__) || \
+@@ -66,6 +66,8 @@
+ 	defined(__AARCH64EL__) || \
      defined(nios2) || defined(__nios2) || defined(__nios2__)
  #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 +#elif defined(__mc68000__)
@@ -26,5 +28,5 @@ index 69cea1aca..a7bda0171 100644
  #if defined(_WIN32)
  // Windows uses a 64bit wide floating point stack.
 -- 
-2.14.4
+2.26.2