[grilo-plugins] build: update Travis CI configuration

[Juan A. Suarez Romero <jasuarez src gnome org>]

commit cafb46fc0c18fe15bbee1adc642f538df3accca8
Author: Juan A. Suarez Romero <jasuarez igalia com>
Date:   Sun Jun 23 13:32:32 2013 +0000

    build: update Travis CI configuration
    
    "test" has been renamed to "tests".

 .travis.yml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/.travis.yml b/.travis.yml
index 66bca61..4a677f5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,4 +15,4 @@ script:
   - make check
 after_success:
   - find . -path "*/.libs/*" -name "*.gc??" | while read -r p ; do mv "$p" "${p%%/.libs/*}" ; done
-  - coveralls --exclude test --exclude help
+  - coveralls --exclude tests --exclude help