can-calc-bit-timing: add a proper GNU license agreement
can-calc-bit-timing: add a proper GNU license agreement

Signed-off-by: Wolfgang Grandegger <5aa1976eca1fee4e35c7b71ec8e8a0ebad9da3d1@grandegger.com>
Signed-off-by: Marc Kleine-Budde <4a0ea1158d3cc63151119c05b1bff00c0bdbf421@pengutronix.de>

carloop/can-utils-osx,carloop/can-utils-osx