pm-graph: Update to v5.11

install_latest_from_github.sh:
 - Added a new script which allows users to install the latest pm-graph
   from the upstream github repo. This is useful if the kernel source
   version has issues that have already been fixed in github.

sleepgraph.py:
 - Updated all the dmesg suspend/resume PM print formats to be able to
   process recent timelines using dmesg only.

 - Added ethtool output to the log for the system's ethernet device id the
   ethtool exists. This helps in debugging network issues.

 - Made the tool more robustly handle events where mangled dmesg or ftrace
   outputs do not include all the requisite data. The tool fails gracefully
   instead of creating a garbled timeline.

Signed-off-by: Todd Brandt <todd.e.brandt@intel.com>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>