Update buildroot to 2021.02.1 (#1312)

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

buildroot/package/samba4/0005-dcesrv_core-fix-build.patch

@@ -0,0 +1,56 @@
+From 44bccdf7d158ae93ba9a5515038aac2a5ac4fd85 Mon Sep 17 00:00:00 2001
+From: Bernd Kuhls <bernd.kuhls@t-online.de>
+Date: Sat, 27 Mar 2021 17:17:34 +0100
+Subject: [PATCH] dcesrv_core: fix build
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Move include of system/network.h to avoid a build error:
+
+In file included from ../../lib/replace/system/network.h:35,
+                 from ../../librpc/rpc/dcesrv_core.c:2658:
+usr/include/unistd.h: At top level:
+usr/include/unistd.h:675:16: error: conflicting types for ‘geteuid’
+  675 | extern __uid_t geteuid (void) __THROW;
+
+Patch sent upstream:
+https://gitlab.com/samba-team/samba/-/merge_requests/1871
+
+Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
+---
+ librpc/rpc/dcesrv_core.c | 11 +----------
+ 1 file changed, 1 insertion(+), 10 deletions(-)
+
+diff --git a/librpc/rpc/dcesrv_core.c b/librpc/rpc/dcesrv_core.c
+index 70e0245532e..e761329d157 100644
+--- a/librpc/rpc/dcesrv_core.c
++++ b/librpc/rpc/dcesrv_core.c
+@@ -32,6 +32,7 @@
+ #include "lib/tsocket/tsocket.h"
+ #include "librpc/gen_ndr/ndr_dcerpc.h"
+ #include "lib/util/tevent_ntstatus.h"
++#include "system/network.h"
+ 
+ 
+ #undef DBGC_CLASS
+@@ -2633,16 +2634,6 @@ _PUBLIC_ void dcesrv_cleanup_broken_connections(struct dcesrv_context *dce_ctx)
+ 	}
+ }
+ 
+-/* We need this include to be able to compile on some plateforms
+- * (ie. freebsd 7.2) as it seems that <sys/uio.h> is not included
+- * correctly.
+- * It has to be that deep because otherwise we have a conflict on
+- * const struct dcesrv_interface declaration.
+- * This is mostly due to socket_wrapper defining #define bind swrap_bind
+- * which conflict with the bind used before.
+- */
+-#include "system/network.h"
+-
+ struct dcesrv_sock_reply_state {
+ 	struct dcesrv_connection *dce_conn;
+ 	struct dcesrv_call_state *call;
+-- 
+2.29.2
+