GitLab

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