add attribute

.gitattributes

@@ -1,13 +1,10 @@
 # Set the default behavior, in case people don't have core.autocrlf set.
 * text=auto
-
 ## Unity ##
-
 *.txt text
 *.cs diff=csharp text
 *.cginc text
 *.shader text
-
 *.mat merge=unityyamlmerge eol=lf
 *.anim merge=unityyamlmerge eol=lf
 *.unity merge=unityyamlmerge eol=lf
@@ -19,9 +16,9 @@
 *.meta merge=unityyamlmerge eol=lf
 *.controller merge=unityyamlmerge eol=lf
 *.flare merge=unityyamlmerge eol=lf
-
 #3D Object
 *.FBX -text
 *.fbx -text
 *.blend -text
 *.obj -text
+*.dll filter=lfs diff=lfs merge=lfs -text