gbmcweb master: SRCREV bump 0512280446..5fddf71304

gBMC Team (7):
      Add support for individual port link states in NIC VEEPROM telemetry.
      Provide CredentialManager to google_api for GenerateSignedCSR without ManagedStore dependency.
      Allow PATCH on ComputerSystem and Write Commands on BootOptions
      Fix async races in gbmcweb's http_client
      Add platform support for new software metrics features and changes
      Support extra I2C FRU scanning addresses
      Fix single-host PostCodes D-Bus service and object path

Fusion-Link: fusion2 N/A
Tested: N/A
Google-Bug-Id: 459542518
Google-Bug-Id: 527528182
Google-Bug-Id: 539556065
Google-Bug-Id: 543143761
Google-Bug-Id: 543170788
Google-Bug-Id: 543564950
Google-Bug-Id: 545239300
Google-Bug-Id: 545645258
Google-Bug-Id: 547461867
Change-Id: If257a4a21ee2c5a252cb9210064b39bf41c52e71
Signed-off-by: Tom Tung <tomtung@google.com>