exa2pro/starpu-max: porting work to Maxeler DFE @ b96308f41eff7281b34a135baf7dddff3c7634d7

Nathalie Furmento 992aac301e minor fixes		11 lat temu
..
callback.c	6757bca1b5 Remove implementation array terminator in tests, examples, and documentation, since it is not actually used	11 lat temu
prologue.c	992aac301e minor fixes	11 lat temu