Add release note for _USE_MATH_DEFINES change
Add release note for _USE_MATH_DEFINES change

Signed-off-by: Edward Lam <15e8b15f4bf4dca51ba7bbf117ec97e9d35017f8@yahoo.com>

dreamworksanimation/openvdb,dreamworksanimation/openvdb,dreamworksanimation/openvdb,dreamworksanimation/openvdb