Bump buidlroot version to 2018.02.6

bsp/buildroot/package/solarus/0001-cmake-remove-Werror.patch

@@ -0,0 +1,27 @@
+From 4d315359d15e1221f3463b77a960a60093aac893 Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour@gmail.com>
+Date: Thu, 22 Jun 2017 00:19:56 +0200
+Subject: [PATCH] cmake: remove Werror
+
+Signed-off-by: Romain Naour <romain.naour@gmail.com>
+---
+ cmake/AddCompilationFlags.cmake | 3 ---
+ 1 file changed, 3 deletions(-)
+
+diff --git a/cmake/AddCompilationFlags.cmake b/cmake/AddCompilationFlags.cmake
+index 5159ff9..a506033 100644
+--- a/cmake/AddCompilationFlags.cmake
++++ b/cmake/AddCompilationFlags.cmake
+@@ -24,9 +24,6 @@ endif()
+ # Be less pedantic in release builds for users.
+ set(CMAKE_CXX_FLAGS_RELEASE "-Wno-error -Wall -Wextra -Wno-unknown-pragmas -Wno-fatal-errors ${CMAKE_CXX_FLAGS_RELEASE}")
+ 
+-# Be more pedantic in debug mode for developers.
+-set(CMAKE_CXX_FLAGS_DEBUG "-Werror -Wall -Wextra -pedantic ${CMAKE_CXX_FLAGS_DEBUG}")
+-
+ # Platform-specific flags.
+ if(WIN32)
+   # MinGW: disable the console by default.
+-- 
+2.9.4
+