Treds, bit late with this...
I'd get an old file or some reasonably sharp edged tool, get a square tub like an old ice cream tub or butter tub, go round the side of the house where it wont be too noticeable (maybe even kneel down and get it from low down) and rub the brickwork with your file with the dust going into your tub, keep going till you've got a good bit, enough to cover your 5 holes.
Get some BUILDERS CAULK (it's not silicone based), press it into the holes then press the brick dust into it.
You'll have a perfect colour match.
Oh when you've done, put the remaining dust back onto the bricks with decent bits of selotape.
Just kidding.
That last bit.