ipmi: Add virtual/phosphor-ipmi-fru-inventory

This virtual provides a configuration file that describes
the IPMI inventory implementation details to ipmi-fru-parser.

Add a recipe that provides the sample that comes with
ipmi-fru-parser.

Add a recipe that generates the file from an MRW.

Change-Id: I331fec22fb603146cbe6b2d57256a2b29adce46b
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/classes/phosphor-ipmi-fru.bbclass b/classes/phosphor-ipmi-fru.bbclass
index d76bbc6..9c0d227 100644
--- a/classes/phosphor-ipmi-fru.bbclass
+++ b/classes/phosphor-ipmi-fru.bbclass
@@ -1 +1,3 @@
 hostfw_datadir="${datadir}/phosphor-ipmi-fru/hostfw"
+inventory_datadir="${datadir}/phosphor-ipmi-fru/inventory"
+config_datadir="${datadir}/phosphor-ipmi-fru/config"