Enable dumping of the Linux extension streams.
Enable dumping of the Linux extension streams.

We now dump information about process's environment/command line/status, Linux release, and CPU info.
Review URL: http://breakpad.appspot.com/238001

git-svn-id: a14e546401035be51a469fbea25ecce70a1a22f2@738 4c0a9323-5329-0410-9bdc-e9ce6186880e

tomgr/google-breakpad,tomgr/google-breakpad,tomgr/google-breakpad,tomgr/google-breakpad,tomgr/google-breakpad