Upgrade logging to resemble base/logging.h.
First phase of extending the relocation packer for arm64.
Upgrade logging to be streams-based. Add new unit tests to cover logging
and checking features. Mechanical changes to logging call sites.
Also correct a type promotion issue that causes incorrect DT_RELCOUNT
adjustments when the packer is compiled as a 32-bit Linux binary.
BUG=385553
Review URL: https://codereview.chromium.org/
392653002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283552 0039d316-1c4b-4281-b951-d872f2087c98