weaved: Fix the location of device_reg_info

Making it right this time. The file should be in /data/misc and
not /var/lib

Change-Id: I33602b3fb3a2df0e8eac4bb52f65faf5f33be23e
diff --git a/buffet/main.cc b/buffet/main.cc
index d2ca7e6..914120c 100644
--- a/buffet/main.cc
+++ b/buffet/main.cc
@@ -55,7 +55,7 @@
 namespace {
 
 const char kDefaultConfigFilePath[] = "/etc/weaved/weaved.conf";
-const char kDefaultStateFilePath[] = "/var/lib/weaved/device_reg_info";
+const char kDefaultStateFilePath[] = "/data/misc/weaved/device_reg_info";
 
 }  // namespace