[alpha] Dep-Wait on libopenmpi-dev (>= 1.3)

[Arthur Loiret <aloiret@debian.org>]

Hi!

The following packages are waiting for openmpi to be fixed on alpha
(see #517543):

dw arpack_2.1+parpack96.dfsg-1 . alpha . -m 'libopenmpi-dev (>= 1.3)'
dw gromacs_4.0.3-1 . alpha . -m 'libopenmpi-dev (>= 1.3)'
dw minc_2.0.17-1 . alpha . -m 'libopenmpi-dev (>= 1.3)'
dw mpi-defaults_0.2 . alpha . -m 'libopenmpi-dev (>= 1.3)'
dw paraview_3.4.0-2 . alpha . -m 'libopenmpi-dev (>= 1.3)'
dw petsc_2.3.3-15 . alpha . -m 'libopenmpi-dev (>= 1.3)'
dw rmpi_0.5-7-1 . alpha . -m 'libopenmpi-dev (>= 1.3)'

Thanks,
Arthur.