A few updates to the valgrind runner script.
A few updates to the valgrind runner script.

- Add G_DEBUG=fatal_warnings to abort on GTK assertions.
- Find the suppressions file no matter where you run the script from.
- Add +x on the script.

Review URL: http://codereview.chromium.org/45011


git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@12001 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser