Dump: add file open error to Create interface

Add "xyz.openbmc_project.Common.File.Error.Open" to the list of errors
for the case where a dump file couldn't be opened in the course of dump
creation.

Initial usage in phosphor-debug-collector repo:
https://github.com/openbmc/phosphor-debug-collector/commit/919f71c652728da24e3e78e3ef14662265c5f812#diff-917a58c38d39e3d9353bec42ba512927c880aa5df49a3aa1700498fb17b25926R80

Signed-off-by: Claire Weinan <cweinan@google.com>
Change-Id: Ief61e89e0b5976a500447a445d90a3520ea20164
diff --git a/yaml/xyz/openbmc_project/Dump/Create.interface.yaml b/yaml/xyz/openbmc_project/Dump/Create.interface.yaml
index f20270a..5543721 100644
--- a/yaml/xyz/openbmc_project/Dump/Create.interface.yaml
+++ b/yaml/xyz/openbmc_project/Dump/Create.interface.yaml
@@ -41,6 +41,7 @@
                 xyz.openbmc_project.Common.Progress to track the progress
                 of the dump
       errors:
+          - xyz.openbmc_project.Common.File.Error.Open
           - xyz.openbmc_project.Common.File.Error.Write
           - xyz.openbmc_project.Dump.Create.Error.Disabled
           - xyz.openbmc_project.Dump.Create.Error.QuotaExceeded