README.md: add news on release 2.1.0-rc0
README.md: add news on release 2.1.0-rc0
01org/tpm2.0-tools,01org/tpm2.0-tools,01org/tpm2.0-tools,martinezjavier/tpm2-tools,martinezjavier/tpm2-tools,martinezjavier/tpm2-tools,martinezjavier/tpm2-tools