Bump buidlroot version to 2018.02.6

bsp/buildroot/package/uboot-tools/0001-drop-configh-from-tools.patch

@@ -1,4 +1,4 @@
-From b742c7590ac6d9ac72dd227679ccff79433b3512 Mon Sep 17 00:00:00 2001
+From 216832de3bc3e6ef093305c6d07f464f7606f2d6 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?J=C3=B6rg=20Krause?= <joerg.krause@embedded.rocks>
 Date: Tue, 4 Aug 2015 22:13:20 +0200
 Subject: [PATCH] drop configh from tools
@@ -13,17 +13,20 @@ image, so it really isn't mandatory.
 Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
 [Jörg Krause: update for version 2015.07]
 Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
+[Romain: update for version 2017.05
+    after commit 9d80b49a671c9922931adcd823aab0ed319a42d1]
+Signed-off-by: Romain Naour <romain.naour@gmail.com>
 ---
- tools/env/fw_env.h | 11 -----------
+ tools/env/fw_env_private.h | 11 -----------
  1 file changed, 11 deletions(-)
 
-diff --git a/tools/env/fw_env.h b/tools/env/fw_env.h
-index 57149e7..50049fe 100644
---- a/tools/env/fw_env.h
-+++ b/tools/env/fw_env.h
-@@ -8,17 +8,6 @@
- #include <aes.h>
- #include <stdint.h>
+diff --git a/tools/env/fw_env_private.h b/tools/env/fw_env_private.h
+index 0c27da0..e550463 100644
+--- a/tools/env/fw_env_private.h
++++ b/tools/env/fw_env_private.h
+@@ -5,17 +5,6 @@
+  * SPDX-License-Identifier:	GPL-2.0+
+  */
  
 -/* Pull in the current config to define the default environment */
 -#include <linux/kconfig.h>
@@ -40,5 +43,5 @@ index 57149e7..50049fe 100644
   * To build the utility with the static configuration
   * comment out the next line.
 -- 
-2.7.4
+2.9.4