Update to 1.2.0 release
    
    This commit updates tpm2-tss to version 1.2.0. It also does some cleanups
    such as changing the SPEC file permission bits, that were not correct and
    renames the project prefix from TPM2.0-TSS to tpm2-tss, that is the name
    used in the upstream project now.
    
    tpm2-tss 1.2.0 does not build correctly on Fedora with GCC7, this has been
    fixed in tpm2-tss master with commits:
    
    64862cb1f7a0 ("implementation.h: Remove preprocessor magic to selectively enable commands.")
    87feb17d81b8 ("implementation.h: Remove preprocessor magic to selectively enable algorithms.")
    
    But those can't be easily cherry picked for 1.2.0, so this commit disables
    the GCC7 int-in-bool-context warning instead.
    
    Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>