Adding missing include statement in tests/lapack-like/HermitianTridiag
Adding missing include statement in tests/lapack-like/HermitianTridiag

sg0/Elemental,mcopik/Elemental,justusc/Elemental,sg0/Elemental,mcopik/Elemental,birm/Elemental,birm/Elemental,sg0/Elemental,birm/Elemental,sg0/Elemental,sg0/Elemental,justusc/Elemental,justusc/Elemental,mcopik/Elemental,mcopik/Elemental,birm/Elemental,mcopik/Elemental,justusc/Elemental,sg0/Elemental,mcopik/Elemental,birm/Elemental,justusc/Elemental,justusc/Elemental,birm/Elemental