Update Buildroot to 2021.02 (#1274)

buildroot/package/dhcpcd/0001-src-privsep-linux.c-add-support-for-nds32-21.patch

@@ -0,0 +1,45 @@
+From 92dc3bd959681cf65d4a3466c89233cf0411b693 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Sat, 30 Jan 2021 12:10:08 +0100
+Subject: [PATCH] src/privsep-linux.c: add support for nds32 (#21)
+
+Fix the following build failure:
+
+privsep-linux.c:206:4: error: #error "Platform does not support seccomp filter yet"
+ #  error "Platform does not support seccomp filter yet"
+    ^~~~~
+In file included from privsep-linux.c:36:
+privsep-linux.c:213:38: error: 'SECCOMP_AUDIT_ARCH' undeclared here (not in a function); did you mean 'SECCOMP_ALLOW_ARG'?
+  BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, SECCOMP_AUDIT_ARCH, 1, 0),
+                                      ^~~~~~~~~~~~~~~~~~
+
+It should be noted that AUDIT_ARCH_NDS32 is only defined since kernel
+5.2 and
+https://github.com/torvalds/linux/commit/fa562447e154334523daa44c0b60625d71a345f5
+
+Fixes:
+ - http://autobuild.buildroot.org/results/af8ba07ea0c12ab8cd24d528ef98db05521f3d36
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+(cherry picked from commit 3848e7204f23bb78eb42dcde4898c70aca67d58d)
+Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
+---
+ src/privsep-linux.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/privsep-linux.c b/src/privsep-linux.c
+index d31d720d..8716032c 100644
+--- a/src/privsep-linux.c
++++ b/src/privsep-linux.c
+@@ -182,6 +182,8 @@ ps_root_sendnetlink(struct dhcpcd_ctx *ctx, int protocol, struct msghdr *msg)
+ #  else
+ #    define SECCOMP_AUDIT_ARCH AUDIT_ARCH_MIPS
+ #  endif
++#elif defined(__nds32__)
++#  define SECCOMP_AUDIT_ARCH AUDIT_ARCH_NDS32
+ #elif defined(__powerpc64__)
+ #  define SECCOMP_AUDIT_ARCH AUDIT_ARCH_PPC64
+ #elif defined(__powerpc__)
+-- 
+2.29.2
+