boot: measure loader.conf in PCR5

boot: measure loader.conf in PCR5

Results in:

- EventNum: 26
  PCRIndex: 5
  EventType: EV_EVENT_TAG
  DigestCount: 4
  Digests:
  - AlgorithmId: sha1
    Digest: 155fb999ca61ba8c7b1f1d87cee821f772ef084a
  - AlgorithmId: sha256
    Digest: 4c26adf231603613afc00bb3d5cad046aec6a525ca01262417c7085caab452b5
  - AlgorithmId: sha384
    Digest: 3e0758cb6605ac274e55d747bf29ee3474fc4413cd5e7a451d1375219cd7f08a30fc915a8df7131657ca78b82b9ccec8
  - AlgorithmId: sha512
    Digest: e32d905b9092c543802f386db9a397d9b6593bdb8360fb747a6d23e491a09595fec8699184cc790d0873a3d52ed16d045538f0c73ece48278fae0fb6ed9b4ed6
  EventSize: 32
  Event: 2a58bcf5180000006c006f0061006400650072002e0063006f006e0066000000