Fix: GPU: Crash caused by buffer overflow of name buffer

This was caused by the name buffer not being sized
accordingly. Now counts the specialization constants.

source/blender/gpu/intern/gpu_shader_create_info.hh

@@ -790,6 +790,7 @@ struct ShaderCreateInfo {
         break;
     }
     specialization_constants_.append(constant);
+    interface_names_size_ += name.size() + 1;
     return *(Self *)this;
   }