Change Dump file storage location

Changed the dump storage location from /tmp/dumps to
/var/lib/phosphor-debug-collector/dumps.

Change-Id: I3751db7b70c634f8642c5c23d8437ac0b94aebc8
Signed-off-by: Jayanth Othayoth <ojayanth@in.ibm.com>
diff --git a/classes/phosphor-debug-collector.bbclass b/classes/phosphor-debug-collector.bbclass
index 030b404..2a2a3a4 100644
--- a/classes/phosphor-debug-collector.bbclass
+++ b/classes/phosphor-debug-collector.bbclass
@@ -1 +1 @@
-bmc_dump_path="/tmp/dumps"
+bmc_dump_path="/var/lib/phosphor-debug-collector/dumps"