add on .gitignore automatically generated keystore file
add on .gitignore automatically generated keystore file

doortts/fork-yobi,ChangsungKim/TestRepository01,yona-projects/yona,doortts/fork-yobi,brainagenet/yobi,oolso/yobi,bloodybear/yona,doortts/forked-for-history,Limseunghwan/oss,bloodybear/yona,naver/yobi,ahb0327/yobi,yona-projects/yona,yona-projects/yona,violetag/demo,bloodybear/yona,violetag/demo,oolso/yobi,doortts/forked-for-history,Limseunghwan/oss,ihoneymon/yobi,ihoneymon/yobi,ihoneymon/yobi,doortts/forked-for-history,bloodybear/yona,ahb0327/yobi,oolso/yobi,brainagenet/yobi,ahb0327/yobi,naver/yobi,doortts/fork-yobi,naver/yobi,doortts/fork-yobi,brainagenet/yobi,ChangsungKim/TestRepository01,yona-projects/yona,Limseunghwan/oss