wflinfo: make errors parsable

Previously, if there was an error, then wflinfo would
print various not easily parsable messages to stderr.

Now, all output will be printed to stdout, and will
follow a similar format to the normal wflinfo output.

Errors from the waffle library will show up like:
Waffle error: 0x%x Some string

Additionally, these may be printed:
Wflinfo error: Misc error w/o a waffle error code
Wflinfo usage error: usage error message (see wflinfo --help)

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>