packaged-staging.bbclass: Use a differnet opkg.conf for each TARGET_ARCH

Assembling an appropriate opkg.conf in the pstage_helper is difficult when
building for multiple target architectures in one Poky directory, work around
this by generating an appropriate opkg.conf for the TARGET_ARCH and using an
${TARGET_ARCH}-opkg.conf for packaged staging.

Signed-off-by: Joshua Lock <josh@linux.intel.com>

meta/classes/packaged-staging.bbclass

@@ -78,7 +78,7 @@ python () {
         bb.data.setVar("PSTAGING_ACTIVE", "0", d)
 }
 
-PSTAGE_MACHCONFIG   = "${PSTAGE_WORKDIR}/opkg.conf"
+PSTAGE_MACHCONFIG   = "${PSTAGE_WORKDIR}/${TARGET_ARCH}-opkg.conf"
 
 PSTAGE_PKGMANAGER = "stage-manager-ipkg"
 
@@ -148,11 +148,11 @@ do_clean_prepend() {
 }
 
 staging_helper () {
-	# Assemble appropriate opkg.conf
+	# Assemble appropriate opkg.conf for the target arch
 	conffile=${PSTAGE_MACHCONFIG}
 	mkdir -p ${PSTAGE_WORKDIR}/pstaging_lists
 	if [ ! -e $conffile ]; then
-		ipkgarchs="${BUILD_ARCH} ${BUILD_ARCH}_${TARGET_ARCH}"
+		ipkgarchs="${TARGET_ARCH} ${BUILD_ARCH} ${BUILD_ARCH}_${TARGET_ARCH}"
 		priority=1
 		for arch in $ipkgarchs; do
 			echo "arch $arch $priority" >> $conffile