Update dump entry and add Notify method

This commit add a new method named Notify to notify the dump
manager about a the creation of a new dump which is ready to be
offloaded. This interface is similar to existing Create interface
which is not exported, the main differnce is in the cases of
internal create the packaging has to be initiated by dump manager.
Add following additional properties in the dump entry.
Type - To differente between different types of dumps so far only
       BMC dump is supported.
Offloaded - Indicate whether the dump is offloaded.
SourceId - Id provided by source of the dump for dumps not stored
           on the BMC.

Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>
Change-Id: I0ef9e5f7342dfe362898b30853a98e185a63b091
diff --git a/xyz/openbmc_project/Dump/Entry/BMC.interface.yaml b/xyz/openbmc_project/Dump/Entry/BMC.interface.yaml
new file mode 100644
index 0000000..562939b
--- /dev/null
+++ b/xyz/openbmc_project/Dump/Entry/BMC.interface.yaml
@@ -0,0 +1,5 @@
+description: >
+    Implement this to add BMC dump management.
+
+    BMC dump is generated on the BMC with debug data
+    for debugging the issues encountered on the BMC.