exa2pro/starpu-max: porting work to Maxeler DFE @ 782dddbbcabe99b2b63ef406d86abd222e5b4bb8

Samuel Thibault 3db86a2ede * Add STARPU_VARIABLE_NBUFFERS to be set in cl.nbuffers, and nbuffers and		12 lat temu
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.externals	41f93730d4 do not forget src/ and tests/ :]	17 lat temu
driver_gordon.c	3db86a2ede * Add STARPU_VARIABLE_NBUFFERS to be set in cl.nbuffers, and nbuffers and	12 lat temu
driver_gordon.h	3a7711af02 src: remove un-needed include pthread.h	13 lat temu
gordon_interface.h	0d9f08ae8d Fix copyrights, thanks Ludo!	15 lat temu