actresses at the Golden Globes may have enrobed themselves like goddesses, but they were eager to remind viewers that they have feet of clay.“You know I had a baby five weeks ago,” Rosamund Pike, the English star of “Gone Girl,” said rather plaintively to that practiced E! smoothie Ryan Seacrest, her hand hovering with a vestigial protectiveness over her midriff. She was wearing a white Vera Wang dress that hung a little low on her torso, with strings at the back, like a paper-doll cutout, and a thousand online knives were already out.