Bump buildroot to 2019.02

bsp/buildroot/package/mini-snmpd/0001-Prepend-zero-byte-before-unsigned-integers.patch

@@ -0,0 +1,31 @@
+From 949ae648bf7c654b8fae607a0988bfa672607156 Mon Sep 17 00:00:00 2001
+From: Patrick Rauscher <prauscher@prauscher.de>
+Date: Fri, 18 Aug 2017 17:31:23 +0200
+Subject: [PATCH] Prepend zero-byte before unsigned integers
+
+fixes #8
+
+Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
+---
+ mib.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/mib.c b/mib.c
+index 7d2e513..a9ffbe2 100644
+--- a/mib.c
++++ b/mib.c
+@@ -207,6 +207,11 @@ static int encode_unsigned(data_t *data, int type, unsigned int ticks_value)
+ 	else
+ 		length = 1;
+ 
++	/* check if the integer could be interpreted negative during a signed decode and prepend a zero-byte if necessary */
++	if ((ticks_value >> (8 * (length - 1))) & 0x80) {
++		length++;
++	}
++
+ 	*buffer++ = type;
+ 	*buffer++ = length;
+ 	while (length--)
+-- 
+2.13.2
+