geckodriver: ci: add i686-unknown-linux-musl target (#267)

Fixes #237.

Source-Repo: https://github.com/mozilla/geckodriver
Source-Revision: aa02f38c97a8a1c69570dc15df80caf8b763dd3e

committer: jgraham <james@hoppipolla.co.uk>

--HG--
extra : rebase_source : b4ea88c92e83b0c40ae965ea41fc6661bfe60e1a

testing/geckodriver/.travis.yml

@@ -30,6 +30,15 @@ matrix:
           packages:
           - musl-tools
           - libbz2-dev
+    - os: linux
+      env:
+        - TARGET=i686-unknown-linux-musl
+        - NAME=linux32
+        - EXT=tar.gz
+      addons:
+        apt:
+          packages: &i686
+          - gcc-multilib
     - os: linux
       env:
         - TARGET=x86_64-pc-windows-gnu