patch.py: set commituser and commitemail for addNote

patch.py: set commituser and commitemail for addNote

When PATCHTOOL is set to 'git', and user don't setup
user.name and user.email for git, do_patch fail with
the following error, fix by passing -c options.
CmdError("git notes --ref refs/notes/devtool append -m 'original patch: 0001-PATCH-increase-to-cpp17-version.patch' HEAD", 0, 'stdout:
stderr: Author identity unknown
*** Please tell me who you are.
Run
  git config --global user.email "you@example.com"
  git config --global user.name "Your Name"

Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>