pm-graph: AnalyzeBoot v2.1

- changed output from single html file to dir with html/dmesg/ftrace
- add sysinfo to logs and timeline
- add -sysinfo command, displays dmidecode values and cpu/mem info
- set trace buffer size to lesser of memtotal/2 or 2GB when using callgraph
- extended timeline to the last init call in user space
  separated timeline into two phases, kernel mode & user mode
- add kernel version check for ftrace usage, 4.10 minimum
- change -filter argument to -func
- add strict protections on -func usage with full symbol checks
  now only works for statically linked functions
  cmd -flistall now ignores all loadable module functions
- add -cgfilter argument for reducing timeline size by removing callgraphs
- crontab usage: preserve existing @reboot lines in user crontab
- fedora support added: uses grub2 loader, handles fedora crontab
- stop using "which" to find binaries, search pre-defined path list
- moved most output processing to analyze_suspend library
Signed-off-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>