exa2pro/starpu-max: porting work to Maxeler DFE @ 1496e10d1f91e86b705c570b1b26b948f55ffbf6

Nathalie Furmento a53cd8edeb fixes based on coverity reports		9 éve
..
axpy.c	54ca953a98 Add missing cl_arg_size initialization	9 éve
axpy.h	bb61f3808d update cnrs copyright	10 éve
axpy_opencl.c	a53cd8edeb fixes based on coverity reports	9 éve
axpy_opencl_kernel.cl	00b1ef6f74 Add more verbose comments in examples source code	9 éve