rootfs_rpm: Add lock file in the rpm deploy directory to allow mutliple rootfs creation tasks to coexist without breaking each other

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/classes/image.bbclass

@@ -90,7 +90,7 @@ LINGUAS_INSTALL = "${@" ".join(map(lambda s: "locale-base-%s" % s, bb.data.getVa
 
 do_rootfs[nostamp] = "1"
 do_rootfs[dirs] = "${TOPDIR}"
-do_rootfs[lockfiles] = "${IMAGE_ROOTFS}.lock"
+do_rootfs[lockfiles] += "${IMAGE_ROOTFS}.lock"
 do_build[nostamp] = "1"
 
 # Must call real_do_rootfs() from inside here, rather than as a separate

meta/classes/rootfs_rpm.bbclass

@@ -28,6 +28,10 @@ opkglibdir = "${localstatedir}/lib/opkg"
 RPMOPTS="--dbpath ${rpmlibdir} --define='_openall_before_chroot 1'"
 RPM="rpm ${RPMOPTS}"
 
+# RPM doesn't work with multiple rootfs generation at once due to collisions in the use of files 
+# in ${DEPLOY_DIR_RPM}. This can be removed if package_update_index_rpm can be called concurrently
+do_rootfs[lockfiles] += "${DEPLOY_DIR_RPM}/rpm.lock"
+
 fakeroot rootfs_rpm_do_rootfs () {
 	set +x