[Beignet] [BUG] Built-in function get_global_size error

[Sun, Yi]

Now the results for calling the function get_global_size are following.
But the lines with sign (*) are wrong, which should be 0, according to
the Spec chapter 6.11.
The test case is ready as attachment.

get_global_size(-1) = 0 (dimension:1)
get_global_size(0) = 1 (dimension:1) 
*get_global_size(1) = 1 (dimension:1) 
*get_global_size(2) = 1 (dimension:1) 

get_global_size(-1) = 0 (dimension:2)
get_global_size(0) = 1 (dimension:2) 
get_global_size(1) = 1 (dimension:2) 
*get_global_size(2) = 1 (dimension:2) 
get_global_size(3) = 0 (dimension:2) 

get_global_size(-1) = 0 (dimension:3)
get_global_size(0) = 1 (dimension:3) 
get_global_size(1) = 1 (dimension:3) 
get_global_size(2) = 1 (dimension:3) 
get_global_size(3) = 0 (dimension:3) 
get_global_size(4) = 0 (dimension:3) 


Thanks
  --Sun, Yi

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