busybox: Fix syslog configuration file

When update alternatives was modified, the syslog configuration file
alternative was incorrectly defined to be "busybox".  Fix this by
enabling the proper target file.

[YOCTO #2557]

(From OE-Core rev: 935f2c02809814de2b903a704707d7bc85bbefdf)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/busybox/busybox.inc

@@ -214,6 +214,7 @@ ALTERNATIVE_LINK_NAME[syslog-init] = "${sysconfdir}/init.d/syslog"
 ALTERNATIVE_LINK_NAME[syslog-startup-conf] = "${sysconfdir}/syslog-startup.conf"
 
 ALTERNATIVE_TARGET = "/bin/busybox"
+ALTERNATIVE_TARGET[syslog-startup-conf] = "${sysconfdir}/syslog-startup.conf.${BPN}"
 
 python do_package_prepend () {
 	# We need to load the full set of busybox provides from the /etc/busybox.links

meta/recipes-core/busybox/busybox_1.19.4.bb

@@ -1,5 +1,5 @@
 require busybox.inc
-PR = "r6"
+PR = "r7"
 
 SRC_URI = "http://www.busybox.net/downloads/busybox-${PV}.tar.bz2;name=tarball \
            file://B921600.patch \