Update buildroot 2020.02.01 (#622)

* Update buildroot 2020.02.01

Signed-off-by: Pascal Vizeli <pvizeli@syshack.ch>

* Fix LN

* Fix wpa

Signed-off-by: Pascal Vizeli <pvizeli@syshack.ch>

* Fix lint

Signed-off-by: Pascal Vizeli <pvizeli@syshack.ch>

* fix-network

Signed-off-by: Pascal Vizeli <pvizeli@syshack.ch>

* Fix script

Signed-off-by: Pascal Vizeli <pvizeli@syshack.ch>

buildroot/board/andes/readme.txt

@@ -0,0 +1,49 @@
+Intro
+=====
+
+Andestech(nds32) AE3XX Platform
+
+The AE3XX prototype demonstrates the AE3XX example platform on the FPGA. 
+It is composed of one Andestech(nds32) processor and AE3XX.
+
+How to build it
+===============
+
+Configure Buildroot
+-------------------
+
+The andes_ae3xx_defconfig configuration is a sample configuration with
+all that is required to bring the FPGA Development Board:
+
+  $ make andes_ae3xx_defconfig
+
+Build everything
+----------------
+Note: you will need to have access to the network, since Buildroot will
+download the packages' sources.
+
+  $ make
+
+Result of the build
+-------------------
+
+After building, you should obtain this tree:
+
+output/images/
+    +-- vmlinux
+    +-- rootfs.cpio
+    +-- rootfs.tar
+
+How to run it
+=============
+
+Run
+---
+
+  Setup the Console with the rate 38400/8-N-1.
+
+  $ cd output/images
+  $ ../host/bin/nds32le-linux-gdb vmlinux
+  $ target remote [your host]
+  $ lo
+  $ c