[opengrok] Don't fail the build for checkstyle violations

[trond.nor...@sun.com]

Author: Trond Norbye <trond.norbye at sun.com>
Repository: /hg/opengrok/trunk
Latest revision: 9171309b118d8f265a936e2e0624229c0bb8bbf3
Total changesets: 1
Log message:
Don't fail the build for checkstyle violations

Files:
        update: build.xml