Packaging warnings with tpm2-tools on Yocto Thud

[jyong2]

meta-tpm2/recipes-tpm/tpm2-tools/tpm2-tools.inc needs to inherit bash-completion.

Bitbake produces the following warnings otherwise:
WARNING: tpm2-tools-git.AUTOINC+e3a2fcf720-r0 do_package: QA Issue: tpm2-tools: Files/directories were installed but not shipped in any package:
/usr/share
/usr/share/bash-completion
/usr/share/bash-completion/completions
/usr/share/bash-completion/completions/tpm2_policyauthorize
/usr/share/bash-completion/completions/tpm2_makecredential
/usr/share/bash-completion/completions/tpm2_policysecret
...