[NaCl SDK] Re-order the calls to createNaClModule and attachDefaultListeners.

If attachDefaultListeners is called after createNaClModule, then there is a
potential race condition -- if the module loads quickly enough, the listeners
will not yet be attached when the 'load' message is dispatched.

BUG=245910
R=sbc@chromium.org

Review URL: https://codereview.chromium.org/33423005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230170 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230170