Bump buidlroot version to 2018.02.6

bsp/buildroot/package/libressl/0001-remove-test-z-DESTDIR-from-ltmain.patch

@@ -0,0 +1,28 @@
+From 4317d43d74996ad7ec3270b1e786e91a19312309 Mon Sep 17 00:00:00 2001
+From: Adam Duskett <Adamduskett@outlook.com>
+Date: Sat, 24 Jun 2017 13:08:57 -0400
+Subject: [PATCH] remove test -z "$DESTDIR" from ltmain.sh.
+
+Without this patch, buildroot-libtool-v2.4.patch will fail to apply.
+
+Signed-off-by: Adam Duskett <Adamduskett@outlook.com>
+---
+ ltmain.sh | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/ltmain.sh b/ltmain.sh
+index 5d29bd6..6c90601 100644
+--- a/ltmain.sh
++++ b/ltmain.sh
+@@ -6658,7 +6658,7 @@ func_mode_link ()
+ 	  *)
+ 	    if test "$installed" = no; then
+ 	      func_append notinst_deplibs " $lib"
+-	      test -z "$DESTDIR" && need_relink=yes
++	      need_relink=yes
+ 	    fi
+ 	    ;;
+ 	  esac
+-- 
+2.9.4
+

bsp/buildroot/package/libressl/0002-Fix-build-with-musl-and-older-Linux-kernel.patch

@@ -0,0 +1,38 @@
+From: Baruch Siach <baruch@tkos.co.il>
+Date: Fri, 29 Sep 2017 10:06:52 +0300
+Subject: [PATCH] Fix build with musl and older Linux kernel
+
+The musl libc carries its own copy of Linux system calls. When building
+with Linux headers older than v3.17, musl provides SYS_getrandom
+definition, but not GRND_NONBLOCK. This causes build failure for
+libressl and openntpd:
+
+getentropy_linux.c: In function 'getentropy_getrandom':
+getentropy_linux.c:205:42: error: 'GRND_NONBLOCK' undeclared (first use in this function)
+   ret = syscall(SYS_getrandom, buf, len, GRND_NONBLOCK);
+                                          ^~~~~~~~~~~~~
+
+Define GRND_NONBLOCK locally when its definition is missing to fix the
+build. There should be no run-time effect. Older kernels return ENOSYS
+for unsupported syscall().
+
+[ from upstream pull request with file location changed ]
+Signed-off-by: Baruch Siach <baruch@tkos.co.il>
+---
+Upstream status: https://github.com/libressl-portable/openbsd/pull/82
+
+diff -Nuar libressl-2.5.5-orig/crypto/compat/getentropy_linux.c libressl-2.5.5/crypto/compat/getentropy_linux.c
+--- libressl-2.5.5-orig/crypto/compat/getentropy_linux.c	2017-07-09 13:59:48.000000000 +0300
++++ libressl-2.5.5/crypto/compat/getentropy_linux.c	2017-09-29 10:03:32.447958829 +0300
+@@ -194,6 +194,11 @@
+ }
+ 
+ #ifdef SYS_getrandom
++
++#ifndef GRND_NONBLOCK
++#define GRND_NONBLOCK   0x0001
++#endif
++
+ static int
+ getentropy_getrandom(void *buf, size_t len)
+ {

bsp/buildroot/package/libressl/libressl.hash

@@ -0,0 +1,2 @@
+# From https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/SHA256
+sha256	859edfc71019d27c448fe148e679afdd972a0baa91b21f02b2b2f5f8a84ddd2a	libressl-2.6.5.tar.gz

bsp/buildroot/package/libressl/libressl.mk

@@ -0,0 +1,20 @@
+################################################################################
+#
+# libressl
+#
+################################################################################
+
+LIBRESSL_VERSION = 2.6.5
+LIBRESSL_SITE = https://ftp.openbsd.org/pub/OpenBSD/LibreSSL
+LIBRESSL_LICENSE = ISC (new additions), OpenSSL or SSLeay (original OpenSSL code)
+LIBRESSL_LICENSE_FILES = COPYING
+LIBRESSL_INSTALL_STAGING = YES
+
+ifeq ($(BR2_PACKAGE_LIBRESSL_BIN),)
+define LIBRESSL_REMOVE_BIN
+	$(RM) -f $(TARGET_DIR)/usr/bin/openssl
+endef
+LIBRESSL_POST_INSTALL_TARGET_HOOKS += LIBRESSL_REMOVE_BIN
+endif
+
+$(eval $(autotools-package))