[travis] install xmllint to run documentation tests

Patch by Darafei Praliaskouski

git-svn-id: http://svn.osgeo.org/postgis/trunk@15879 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/.travis.yml b/.travis.yml
index 3f0e3de1a0c2b42200a4fac8e9526c113189e2a4..da2503125e7bb039e9303473cf652d774951efcb 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ before_install:
   - sudo add-apt-repository --yes ppa:ubuntugis/ubuntugis-unstable
   - sudo apt-get update -qq
   - sudo apt-get install -y --no-install-recommends
-      postgresql-9.6 postgresql-server-dev-9.6
+      postgresql-9.6 postgresql-server-dev-9.6 libxml2-utils
       libcunit1-dev xsltproc docbook-xsl docbook-mathml dblatex
       libproj-dev libgdal-dev libgeos-dev libjson0-dev
       libsfcgal1 libsfcgal-dev libprotobuf-c0-dev libgdal-dev