Tweak for Intel HD Graphics in --list=opencl-devices. Apparently they
don't have a notion of SP, just EU.

	Device #2 (2) name:	HD Graphics 4000
	Device vendor:		Intel
	Device type:		GPU (LE)
	Device version:		OpenCL 1.2 
	Driver version:		1.2(Sep 19 2013 22:31:23)
	Native vector widths:	char 1, short 1, int 1, long 1
	Preferred vector width:	char 1, short 1, int 1, long 1
	Global Memory:		1024.0 MB
	Local Memory:		64.0 KB (Local)
	Max memory alloc. size:	256.2 MB
	Max clock (MHz) :	1200
	Max Work Group Size:	512
	Parallel compute cores:	16