travis: Install libtool for OS X builds

CI is failing due to missing libtoolize, so I'm trying this.

diff --git a/.travis.yml b/.travis.yml
index c76d10c518110ef4a28199d284effe8bec7b7e49..52cb146148d2149c4a57587eeda0d273f4e2f3d8 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ language: c
 
 install:
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update > /dev/null; fi
-  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install openssl libidn rtmpdump libssh2 c-ares libmetalink libressl nghttp2; fi
+  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install libtool openssl libidn rtmpdump libssh2 c-ares libmetalink libressl nghttp2; fi
 
 before_script:
   - ./buildconf