Add comment to clarify Checkstyle logic in our build file
Add comment to clarify Checkstyle logic in our build file

+review REVIEW-6320

gradle/gradle,gstevey/gradle,lsmaira/gradle,robinverduijn/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,lsmaira/gradle,blindpirate/gradle,lsmaira/gradle,lsmaira/gradle,lsmaira/gradle,robinverduijn/gradle,robinverduijn/gradle,robinverduijn/gradle,blindpirate/gradle,gstevey/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,lsmaira/gradle,robinverduijn/gradle,gstevey/gradle,blindpirate/gradle,blindpirate/gradle,robinverduijn/gradle,gradle/gradle,gstevey/gradle,blindpirate/gradle,lsmaira/gradle,gradle/gradle,robinverduijn/gradle,robinverduijn/gradle,gstevey/gradle,gstevey/gradle,robinverduijn/gradle,robinverduijn/gradle,robinverduijn/gradle,lsmaira/gradle,gradle/gradle,gstevey/gradle,gstevey/gradle,gradle/gradle,lsmaira/gradle,gradle/gradle,lsmaira/gradle,blindpirate/gradle,blindpirate/gradle,blindpirate/gradle,gstevey/gradle