PATCH: install golang-1.13 during travis-ci build as it is required for BoringSSL

[Илья Шипицин]

please see attached patch

From 5fa12aec93f1e8989e06628fc5e41fc2556f532b Mon Sep 17 00:00:00 2001
From: Ilya Shipitsin <chipits...@gmail.com>
Date: Mon, 16 Sep 2019 16:13:10 +0500
Subject: [PATCH] BUILD: CI: install golang-1.13 when building BoringSSL

---
 scripts/build-ssl.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/build-ssl.sh b/scripts/build-ssl.sh
index cec81e04a..384438a22 100755
--- a/scripts/build-ssl.sh
+++ b/scripts/build-ssl.sh
@@ -79,6 +79,10 @@ fi
 
 if [ ! -z ${BORINGSSL+x} ]; then
 	(
+
+	# travis-ci comes with go-1.11, while boringssl requires go-1.13
+	eval "$(curl -sL https://raw.githubusercontent.com/travis-ci/gimme/master/gimme | GIMME_GO_VERSION=1.13 bash)"
+
         download_boringssl
 	cd download-cache/boringssl
         if [ -d build ]; then rm -rf build; fi
-- 
2.20.1