procd: update to git HEAD

 639df57 uxc: fix build with uClibc-ng
 b2230e4 procd: add service instance watchdog

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

package/system/procd/Makefile

@@ -12,9 +12,9 @@ PKG_RELEASE:=3
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/procd.git
-PKG_SOURCE_DATE:=2020-07-13
-PKG_SOURCE_VERSION:=dacab12b301085eac00e84a94e42096de70886e8
-PKG_MIRROR_HASH:=e9c49884ea1dd6554ce057c8ca7fb23bc980939b92e11f43d37b930c29f63dbd
+PKG_SOURCE_DATE:=2020-07-14
+PKG_SOURCE_VERSION:=b2230e4ff28b29472d0a232fee5d9f4168390b52
+PKG_MIRROR_HASH:=67dd91d469a2e996a6b350575cfc0accedcf9ac948feaeee0d665199820bb6b0
 CMAKE_INSTALL:=1
 
 PKG_LICENSE:=GPL-2.0