Made Barcode Scanner builds runs clean first to prevent stale resources and build problems related to the state ProGuard leaves the class files in.
Made Barcode Scanner builds runs clean first to prevent stale resources and build problems related to the state ProGuard leaves the class files in.

git-svn-id: 0b99b41c5c84574e525f2ba59b508f5deb570dd8@1183 59b500cc-1b3d-0410-9834-0bbf25fbcc57

krischik/zxing-android-minimal,praveen062/zxing-android-embedded,movedon2otherthings/zxing-android-embedded,ALenfant/zxing-android-embedded,BugMaker/zxing-android-embedded,jonzl/sample-zxing,tsdl2013/zxing-android-embedded,j-mateo/zxing-android-embedded,jonzl/sample-zxing,journeyapps/zxing-android-embedded,BugMaker/zxing-android-embedded,jeason789/test_embedded,Promptus/zxing-android-minimal,renekaigen/zxing-android-embedded,BBBInc/zxing-android-embedded,krischik/zxing-android-minimal,jonzl/sample-zxing,jemsnaban/zxing-android-embedded,Promptus/zxing-android-minimal,youyi1314/zxing-android-embedded,0359xiaodong/zxing-android-embedded,cnevinc/zxing-android-embedded,WangXiaoxi/zxing-android-minimal,wudayu/zxing-android-embedded,dimoge/zxing-android-embedded,binson1989/zxing-android-embedded,BugMaker/zxing-android-embedded,dhosford/zxing-android-embedded,WangXiaoxi/zxing-android-minimal