docs: update some bits of GL status

docs/GL-status.txt

@@ -51,7 +51,7 @@ GL 4.1, GLSL 4.10 ---
 
 GL 4.2, GLSL 4.20:
 
-  GL_ARB_texture_compression_bptc                     
+  GL_ARB_texture_compression_bptc                      DONE
   GL_ARB_compressed_texture_pixel_storage             
   GL_ARB_shader_atomic_counters                       
   GL_ARB_texture_storage                              
@@ -83,7 +83,7 @@ GL 4.3, GLSL 4.30:
   GL_ARB_robust_buffer_access_behavior                
   GL_ARB_shader_image_size                             
   GL_ARB_shader_storage_buffer_object                  
-  GL_ARB_stencil_texturing                             
+  GL_ARB_stencil_texturing                             DONE
   GL_ARB_texture_buffer_range                          
   GL_ARB_texture_query_levels                          
   GL_ARB_texture_storage_multisample                   
@@ -100,7 +100,7 @@ GL 4.4, GLSL 4.40:
   GL_ARB_multi_bind                                    
   GL_ARB_query_buffer_object                           
   GL_ARB_texture_mirror_clamp_to_edge                  
-  GL_ARB_texture_stencil8                             
+  GL_ARB_texture_stencil8                             DONE
   GL_ARB_vertex_type_10f_11f_11f_rev                   
 
 GL 4.5, GLSL 4.50: