initscripts-swupdate: remove `virtual/` build warnings

Replace the `virtual/` syntax with the recommended `VIRTUAL-RUNTIME_`
variables to prevent build warnings since scarthgap.

(See Poky rev: 9b5b62879979de3488c920f21ea358e72ff1e443)

Signed-off-by: Gerard Salvatella <gerard.salvatella@siemens.com>

recipes-core/initscripts-swupdate/initscripts-swupdate-usb.bb

@@ -7,8 +7,6 @@ LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda
 SRC_URI = "file://rcS.swupdate \
 	"
 
-RPROVIDES:${PN} += "virtual/initscripts-swupdate"
-
 S = "${WORKDIR}"
 
 inherit allarch update-alternatives

recipes-extended/images/swupdate-image.inc

@@ -4,6 +4,8 @@ USE_DEVFS = "1"
 # This variable is triggered to check if sysvinit must be overwritten by a single rcS
 export SYSVINIT = "no"
 
+VIRTUAL-RUNTIME_initscripts-swupdate = 'initscripts-swupdate'
+
 IMAGE_INSTALL = "base-files \
 		base-passwd \
 		busybox \
@@ -12,7 +14,7 @@ IMAGE_INSTALL = "base-files \
 		libconfig \
 		swupdate \
 		swupdate-www \
-                ${@bb.utils.contains('SWUPDATE_INIT', 'tiny', 'virtual/initscripts-swupdate', 'initscripts sysvinit', d)} \
+                ${@bb.utils.contains('SWUPDATE_INIT', 'tiny', '${VIRTUAL-RUNTIME_initscripts-swupdate}', 'initscripts sysvinit', d)} \
 		util-linux-sfdisk \
 		 "