procd: add hotplug-call dispatcher ubus objects

Add per-subsystem ubus objects exposing hotplug-call.

Signed-off-by: Daniel Golle <[email protected]>

package/system/procd/Makefile

@@ -12,9 +12,9 @@ PKG_RELEASE:=$(AUTORELEASE)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/procd.git
-PKG_SOURCE_DATE:=2021-02-02
-PKG_SOURCE_VERSION:=fd183797bc527a160958a5dee6b5af35646ccc6b
-PKG_MIRROR_HASH:=29c851100a05e077adc12719b867714d38b06e5cfcd84b9485b1cb5552399f2e
+PKG_SOURCE_DATE:=2021-02-08
+PKG_SOURCE_VERSION:=08938fe1cbc06eeaafa39448057368391d165272
+PKG_MIRROR_HASH:=efc3deac56057e929789d44742858b2a16d976f6bfa0a2036e413d10afcaeee4
 CMAKE_INSTALL:=1
 
 PKG_LICENSE:=GPL-2.0