init: add back TARGET_INIT_VENDOR_LIB for vendor_load_properties

squashed:

init: add libinit hook for devices to create device links

let devices react to device uevents e.g. for creating
links in /dev/block/by-name/ when there is no partition name
available like on raspi with MBR boot device

Change-Id: If657c2608dc5f5363fed4a987f496cd09b56816f
diff --git a/init/property_service.cpp b/init/property_service.cpp
index 0d6eb15..64f2949 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -77,6 +77,7 @@
 #include "subcontext.h"
 #include "system/core/init/property_service.pb.h"
 #include "util.h"
+#include "vendor_init.h"
 
 static constexpr char APPCOMPAT_OVERRIDE_PROP_FOLDERNAME[] =
         "/dev/__properties__/appcompat_override";
@@ -1458,6 +1459,10 @@
             }
             InitPropertySet("ro.persistent_properties.ready", "true");
             persistent_properties_loaded = true;
+
+            /* vendor-specific properties
+            */
+            vendor_load_properties();
             break;
         }
         default: