small gitignore fix
small gitignore fix


Former-commit-id: 6806395e9a19201478190bd9c8e43d67448ef3b1
clab/dynet,clab/dynet,shuheik/dynet,chunyang-wen/dynet,clab/cnn,danielhers/dynet,clab/dynet,shuheik/dynet,xunzhang/dynet,shuheik/dynet,shuheik/dynet,danielhers/dynet,xunzhang/dynet,chunyang-wen/dynet,clab/dynet,clab/cnn,danielhers/dynet,clab/dynet,clab/cnn,shuheik/dynet,chunyang-wen/dynet,xunzhang/dynet,chunyang-wen/dynet,shuheik/dynet,danielhers/dynet,clab/dynet,clab/dynet,danielhers/dynet,xunzhang/dynet,danielhers/dynet,shuheik/dynet,danielhers/dynet