The new codelet is added for all 3 runtimes but only tested with starpu ;-)
An example test7 is added : it is a copy of test6 that uses the new function to build the matrices

ooc test: create a ooc subdirectory in the build dir to write data on disk instead of /tmp/starpu_ooc because we must guarantee that the directory exists

chameleon: add a out_of_core example, requires to handle the case where starpu handles itself the allocation of tiles -> we give a NULL pointer through the get_blkaddr function for registering

update the INSTALL_RPATH at the beginning instead of setting a new one, allows to give additional paths by hand

Add CHAMELEON_SIMULATION_MAGMA option to select whether to enable magma kernels or not in simulation mode