man: add tpm2_shutdown.1
man: add tpm2_shutdown.1

tpm2_shutdown.1 manpage is missing. We need to add it in Makefile.am
for generation.

Signed-off-by: Ying-Chun Liu (PaulLiu) <d85c815cccd4e7eb2bf30ecc174aeb0eef10ab96@debian.org>

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