[gmime] More updates to Travis CI package dependencies

[Jeffrey Stedfast <fejj src gnome org>]

commit 8814e410fbf29648fe10a0add3f135b921799ec4
Author: Jeffrey Stedfast <jestedfa microsoft com>
Date:   Fri Mar 3 09:47:30 2017 -0500

    More updates to Travis CI package dependencies

 .travis.yml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/.travis.yml b/.travis.yml
index 66e6884..e1ac59a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ compiler:
 sudo: required
 before_install:
   - sudo apt-get -qq update
-  - sudo apt-get install -y automake gnome-doc-utils libgpgme11 libgpgme11-dev gpgsm
+  - sudo apt-get install -y automake1.15 gtk-doc-tools gnome-doc-utils libgpgme11 libgpgme11-dev gpgsm
 script:
   - ./autogen.sh
   - ./configure --disable-mono && make && make check