Nudge Travis to work properly.

.travis.yml

@@ -33,6 +33,8 @@ script:
   # Run the role/playbook in --check mode.
   - "ansible-playbook -i tests/inventory tests/$SITE --connection=local --sudo --check"
 
+  - find / -name 'gmp.h'
+
   # Make sure PHP is running.
   - >
     php -v

tasks/install-from-source.yml

@@ -34,7 +34,6 @@
     - libpng-dev
     - libxpm-dev
     - libfreetype6-dev
-    - libgmp-dev
     - libgmp3-dev
     - libmcrypt-dev
     - libmysqlclient-dev