Modify README.md

 - Add notification for removal of pmlogconf

[GF-6145] Notice for removal of pmlogconf

Open-webOS-DCO-1.0-Signed-off-by: Hongjeon Ha <hj.ha@lge.com>

Change-Id: Icd8f825e8d9f6534031d31237298e4c4df1ef7a5
Reviewed-on: https://g2g.palm.com/2227
Reviewed-by: Build Verification
Reviewed-by: Hongjeon Ha <hj.ha@lge.com>
Tested-by: Hongjeon Ha <hj.ha@lge.com>
Reviewed-by: Gayathri Srinivasan <gayathri.srinivasan@lge.com>
Reviewed-by: Keith Derrick <keith.derrick@lge.com>