[Bind] Merge GL2 and GL4 documentation into one

Source/Bind/GL2/GL2Generator.cs

@@ -54,7 +54,7 @@ namespace Bind.GL2
             Settings.DefaultEnumsFile = "GLEnums.cs";
             Settings.DefaultWrappersFile = "GL.cs";
             Settings.DefaultDocPath = Path.Combine(
-                Settings.DefaultDocPath, "GL2");
+                Settings.DefaultDocPath, "GL");
         }
     }
 }

Source/Bind/GL2/GL4Generator.cs

@@ -46,7 +46,7 @@ namespace Bind.GL2
             Settings.DefaultEnumsFile = "GL4Enums.cs";
             Settings.DefaultWrappersFile = "GL4.cs";
             Settings.DefaultDocPath = Path.Combine(
-                Settings.DefaultDocPath, "GL4");
+                Settings.DefaultDocPath, "GL");
 
             Profile = "glcore";
         }