GETRF checking fails when multiple threads threads are bind to the same core.

[abouteiller]

Original report by Nuria Losada (Bitbucket: nuriallv, GitHub: nuriallv).

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The result checking fails on GETRF when multiple threads threads are bind to the same core.
Setting info[2] = 1 on the body of getrf at zgetrf.jdf seems to fix it.

Small reproducer (running on saturn, nodes c0*) using the dplasma/tests

mpirun -np 1 ./testing_dgetrf -c 4 -N 20 -t 2 -x -- --parsec_bind file:binding_onecore

$ cat binding_onecore 
0

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