tests/flushcontext.sh: silence tpm2_createpolicy stdout
tests/flushcontext.sh: silence tpm2_createpolicy stdout

Remove this noise from the test output.

Fixes:
tests/startup.sh ... PASSED
tests/hmac.sh ... PASSED
\TPM2_SE_POLICY: 0x33E36E786C878632494217C3F490E74CA0A3A122A8A4F3C5302500DF3B32B3B8
|TPM2_SE_POLICY: 0x33E36E786C878632494217C3F490E74CA0A3A122A8A4F3C5302500DF3B32B3B8
tests/flushcontext.sh ... PASSED

Signed-off-by: William Roberts <60148e894dabf0b83bde1d460768794cd453c455@intel.com>

martinezjavier/tpm2-tools,01org/tpm2.0-tools,01org/tpm2.0-tools,martinezjavier/tpm2-tools,01org/tpm2.0-tools,martinezjavier/tpm2-tools,martinezjavier/tpm2-tools