Bug 912807: Use --enable-content-sandbox-reporter on eng builds.
Merge pull request #114 from jld/bug912807-sandbox-reporter

Bug 912807: Use --enable-content-sandbox-reporter on eng builds.
Bug 920823 - Code cleanup and other improvements. r=mwu
Bug 920823 (followup) - Link with liblog. a=bustage
Bug 924147 - Enable dark matter detector on eng builds

DMD is a tool for that tracks which heap blocks have been reported by memory reporters.
See https://wiki.mozilla.org/Performance/MemShrink/DMD for details.

Change-Id: Ia110d1a64eb091b759ac2fba310957f6afbd6dcc