2.15: Clarify that AccountPatchReviewStore was moved in 2.13
2.15: Clarify that AccountPatchReviewStore was moved in 2.13

Change-Id: I3ade35ca0a4f52c00ab816821a56590ebc1e3d6e

GerritCodeReview/homepage,GerritCodeReview/homepage,GerritCodeReview/homepage,GerritCodeReview/homepage,GerritCodeReview/homepage