Move FilePath to Common dir and update Software README

The FilePath yaml was initially created under the base
xyz/openbmc_project/ directory. There's now a Common
subdirectory to hold all the common yaml files, so move
it there.
Also update the Software README to include the Common
FilePath interface.

Change-Id: Ibb18e198f68927c0629accc103f37055abd0f5d1
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/xyz/openbmc_project/FilePath.interface.yaml b/xyz/openbmc_project/Common/FilePath.interface.yaml
similarity index 100%
rename from xyz/openbmc_project/FilePath.interface.yaml
rename to xyz/openbmc_project/Common/FilePath.interface.yaml
diff --git a/xyz/openbmc_project/Software/README.md b/xyz/openbmc_project/Software/README.md
index f732e56..15c0eaf 100644
--- a/xyz/openbmc_project/Software/README.md
+++ b/xyz/openbmc_project/Software/README.md
@@ -24,7 +24,9 @@
 REST and DownloadViaTFTP() for TFTP.  The standard Object.Delete() interface
 would also be provided to facilitate removing images which are no longer
 needed.  Images maintained in the file system would be presented as a
-corresponding `/xyz/openbmc_project/software/<id>` object.
+corresponding `/xyz/openbmc_project/software/<id>` object. In addition, the
+`xyz.openbmc_project.Common.FilePath` interface would be provided to specify
+the location of the image.
 
 It is assumed that the *ImageManager* has [at least] a bare minimum amount of
 parsing knowledge, perhaps due to a common image format, to allow it to