Replace Lena with Hopper (Part II)

For https://github.com/python-pillow/Pillow/issues/884

Looking at the images, there's definitely something happening there. It may just be that the original was a bad test, since there's no pixels with the transparent color. 

Hopper:
```
  Histogram:
       971: (  0,  0,  0,  0) #00000000 none
      1871: (  0,  0, 51,255) #000033 rgba(0,0,51,1)
       111: (  0,  0,102,255) #000066 rgba(0,0,102,1)
       812: (  0, 51,  0,255) #003300 rgba(0,51,0,1)
```
Lena:
```
  Histogram:
         4: ( 51,  0,  0,255) #330000 rgba(51,0,0,1)
        79: ( 51,  0, 51,255) #330033 rgba(51,0,51,1)
         4: ( 51,  0,102,255) #330066 rgba(51,0,102,1)
```

My gut instinct is that `P` + `info['transparency']` doesn't convert properly to `RGBA`.