basefiles bbappend: add tmpfiles.d snippet to empty /var/run on boot

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>

recipes-core/base-files/base-files/var-run.conf

@@ -0,0 +1,2 @@
+# empty /var/run
+R	/var/run/*	-	-	-	-	-

recipes-core/base-files/base-files_3.0.14.bbappend

@@ -1,6 +1,8 @@
 FILESEXTRAPATHS := "${THISDIR}/${PN}"
  
-PRINC = "13"
+PRINC = "14"
+
+SRC_URI_append = " file://var-run.conf"
 
 # Original: volatiles = "cache run log lock tmp"
 # We don't any of those in volatiles, so:
@@ -32,3 +34,8 @@ do_install_angstromissue () {
         echo >> ${D}${sysconfdir}/issue
     fi
 }
+
+do_install_append() {
+	install -d ${D}${sysconfdir}/tmpfiles.d
+	install -m 0644 ${WORKDIR}/var-run.conf ${D}${sysconfdir}/tmpfiles.d/
+}