phosphor-dbus-interfaces: srcrev bump a12b0b3b37..edc177f9dc

Chris Cain (1):
      Change power cap bounds to be writable

Zhenwei Chen (1):
      Rename the reverse_name to reverse_names in associations.

Change-Id: I46814b5dca5b7939af0f7c2d57fd2ac7fbdfb1e9
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>