Update changelog for M8

Change-Id: I8e50b811f3798c6f4cd21b8196f71502e8d0aea8
Merge "Update changelog for M8" into cm-11.0
Merge branch 'cm-11.0' into kk_mkt

Conflicts:
	CHANGELOG.mkdn

Change-Id: I9145949f893d1578de5605249b108cb5c945639f