phosphor-certificate-manager: srcrev bump feddcf2017..ca4f7887ca

Patrick Venture (7):
      build: Add missing inclusion of phosphor-logging
      build: add requirement for openssl to configure_ac
      build: add check for experimental/filesystem
      test: delete empty parameters
      build: add gtest, gmock to configure_ac
      gitignore: add missing items
      test: use tabs in Makefile_am

(From meta-phosphor rev: 7222db38e730434d22df4e5cd32f8de5f212494e)

Change-Id: I13c037b80ecf36706499fae8e5eab31309f282c5
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>