ti-cgt-pru: updated version to 2.1.5
ti-cgt-pru: updated version to 2.1.5

Signed-off-by: Ivan Pang <126159d73fcaab716dbbcf802c2f841b60578aed@ti.com>
Signed-off-by: Jacob Stiffler <0ec61db87821c27ca8ee6f3e24c6f93fdbb785d4@ti.com>

rcn-ee/meta-processor-sdk,rcn-ee/meta-processor-sdk,rcn-ee/meta-processor-sdk