pcr-calc currently uses an ACM file to read out the SINIT capabilities
to determine its calculations.  Add an option to just directly provide
the SINIT capabilities.  This is useful for the case of a BIOS provided
ACM when a file is unavailable.  Otherwise pcr-calc will be unable to
run and you cannot forward seal.

Signed-off-by: Jason Andryuk <[email protected]>

You can have a machine do a measured launch from a BIOS-provided ACM
when you don't have an SINIT ACM file.  In that case, you cannot forward
seal because ml-functions fails when it cannot find a file.

Add a fallback mode for when a file cannot be found to parse the SINIT
capabilities out of the txt-stat output.  It's not pretty, but it may do
the trick.  Then you can use the new -C option to pcr-calc for the
forward seal.

Signed-off-by: Jason Andryuk <[email protected]>