Bump Buildroot to 2021.02-rc3 (#1260)

* Rebase patches to Buildroot 2021.02-rc3

* Update Buildroot to 2021.02-rc3

* Declare Kernel headers to be Linux version 5.10 (since they are, and new Buildroot knows about 5.10)

buildroot/package/libglib2/0003-remove-cpp-requirement.patch

@@ -35,7 +35,7 @@ index 4bbf4c2..ac59f4e 100644
 @@ -1,4 +1,4 @@
 -project('glib', 'c', 'cpp',
 +project('glib', 'c',
-   version : '2.64.4',
+   version : '2.66.7',
    # NOTE: We keep this pinned at 0.49 because that's what Debian 10 ships
    meson_version : '>= 0.49.2',
 @@ -10,7 +10,6 @@ project('glib', 'c', 'cpp',

buildroot/package/libglib2/libglib2.hash

@@ -1,4 +1,4 @@
-# https://download.gnome.org/sources/glib/2.64/glib-2.64.4.sha256sum
-sha256  f7e0b325b272281f0462e0f7fff25a833820cac19911ff677251daf6d87bce50  glib-2.64.4.tar.xz
+# https://download.gnome.org/sources/glib/2.66/glib-2.66.7.sha256sum
+sha256  09f158769f6f26b31074e15b1ac80ec39b13b53102dfae66cfe826fb2cc65502  glib-2.66.7.tar.xz
 # License files, locally calculated
 sha256  dc626520dcd53a22f727af3ee42c770e56c97a64fe3adb063799d8ab032fe551  COPYING

buildroot/package/libglib2/libglib2.mk

@@ -4,12 +4,14 @@
 #
 ################################################################################
 
-LIBGLIB2_VERSION_MAJOR = 2.64
-LIBGLIB2_VERSION = $(LIBGLIB2_VERSION_MAJOR).4
+LIBGLIB2_VERSION_MAJOR = 2.66
+LIBGLIB2_VERSION = $(LIBGLIB2_VERSION_MAJOR).7
 LIBGLIB2_SOURCE = glib-$(LIBGLIB2_VERSION).tar.xz
 LIBGLIB2_SITE = http://ftp.gnome.org/pub/gnome/sources/glib/$(LIBGLIB2_VERSION_MAJOR)
 LIBGLIB2_LICENSE = LGPL-2.1+
 LIBGLIB2_LICENSE_FILES = COPYING
+LIBGLIB2_CPE_ID_VENDOR = gnome
+LIBGLIB2_CPE_ID_PRODUCT = glib
 LIBGLIB2_INSTALL_STAGING = YES
 
 LIBGLIB2_CFLAGS = $(TARGET_CFLAGS)