Fix build error in cmake while printing digital build version
Fix build error in cmake while printing digital build version

Signed-off-by: Yanray Wang <dc5ade0068f3380c5c6e9f819921d28cea5625cd@arm.com>

Mbed-TLS/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,Mbed-TLS/mbedtls