Bring in Syzygy r1991 binaries.

This includes new tools for use by the chrome_elf build process.

BUG=
R=caitkp@chromium.org

Review URL: https://codereview.chromium.org/138683002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244951 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244952 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244952