init: print property/value for wait_for_property

Bug: 123772265
Bug: 123788098
Test: Build
Change-Id: Ice130d7efab1f227a2f9021136621ad08f84fd23
diff --git a/init/init.cpp b/init/init.cpp
index d360fdd..990ea88 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -190,7 +190,8 @@
 
     if (waiting_for_prop) {
         if (wait_prop_name == name && wait_prop_value == value) {
-            LOG(INFO) << "Wait for property took " << *waiting_for_prop;
+            LOG(INFO) << "Wait for property '" << wait_prop_name << "=" << wait_prop_value
+                      << "' took " << *waiting_for_prop;
             ResetWaitForProp();
         }
     }