Update to version 8

- Make a "make coverity" rule to scan the source
  Results at: https://scan.coverity.com/projects/rhboot-dbxtool
- Don't try to apply anything if PK and KEK aren't enrolled
- Add --force and --quiet for the PK/KEK checker, and use them in the
  systemd service.
- Add a .syntastic_c_config for vim's Syntastic modules
- Use tsearch()/tfind()/tdestroy() from libc instead of ccan htables
- Don't open the dbx file with O_RDWR|O_CREAT, use O_RDONLY.
- Lots of minor bug fixes gcc -Wextra and friends found.

dbxtool 7

- Hopefully make creating a new dbx variable work
- Add new dbxupdate.bin for CVE-2016-3320 and
  https://support.microsoft.com/en-us/kb/3179577

Bump version to 0.4

Signed-off-by: Peter Jones <pjones@redhat.com>

Bump version to 0.3

Signed-off-by: Peter Jones <pjones@redhat.com>

Bump version to 0.2

Signed-off-by: Peter Jones <pjones@redhat.com>

Bump version to 0.3

Signed-off-by: Peter Jones <pjones@redhat.com>

Bump version to 0.2

Signed-off-by: Peter Jones <pjones@redhat.com>