Fifteenth time's the charm

.travis.yml

@@ -21,8 +21,9 @@ sudo: false
 before_install:
     - sudo add-apt-repository -y ppa:longsleep/golang-backports
     - sudo apt-get update
-    - sudo apt-get remove golang-go
     - sudo apt-get install golang-1.13-go
+install:
+    - export PATH=/usr/lib/go-1.13/bin:$PATH
 before_script:
     - git clone https://boringssl.googlesource.com/boringssl
     - cd boringssl