[shill] Use base/logging.h, but with syslog support.

Also, go to base/command_line.h; I love gflags, but base/logging.h requires CommandLine, and having two
ways to handle command line flags seems bad.  cros-disks does it, though...

BUG=None
TEST=unit tests

Change-Id: I2a88926366d324a102dfe50583d244c49f33af08
Reviewed-on: http://gerrit.chromium.org/gerrit/602
Reviewed-by: Chris Masone <cmasone@chromium.org>
Tested-by: Chris Masone <cmasone@chromium.org>
10 files changed