busybox: move su to /bin for lsb command check test

In busybox, util-linux and shadow, su has been moved to /usr/bin/,
but lsb cmdchk needs su in /bin.

Move su to /bin could fix this issue.

[YOCTO#5175]

(From OE-Core rev: daff19fe6f0490dc7036602e8b0ca40a23b55556)

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/busybox/busybox-1.21.1/su-usr-bin.patch

@@ -1,26 +0,0 @@
-busybox: move /bin/su to /usr/bin/su to match util-linux and shadow
-
-Both of util-linux and shadow have su binary in /usr/bin, fix busybox
-to use the same path so they can be properly tracked by alternatives.
-
-Upstream-Status: Inappropriate [embedded]
-Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
----
- include/applets.src.h | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/include/applets.src.h b/include/applets.src.h
---- a/include/applets.src.h
-+++ b/include/applets.src.h
-@@ -349,7 +349,7 @@ IF_STAT(APPLET(stat, BB_DIR_USR_BIN, BB_SUID_DROP))
- IF_STRINGS(APPLET(strings, BB_DIR_USR_BIN, BB_SUID_DROP))
- IF_STTY(APPLET(stty, BB_DIR_BIN, BB_SUID_DROP))
- /* Needs to be run by root or be suid root - needs to change uid and gid: */
--IF_SU(APPLET(su, BB_DIR_BIN, BB_SUID_REQUIRE))
-+IF_SU(APPLET(su, BB_DIR_USR_BIN, BB_SUID_REQUIRE))
- IF_SULOGIN(APPLET(sulogin, BB_DIR_SBIN, BB_SUID_DROP))
- IF_SUM(APPLET(sum, BB_DIR_USR_BIN, BB_SUID_DROP))
- IF_SV(APPLET(sv, BB_DIR_USR_BIN, BB_SUID_DROP))
--- 
-1.8.1.2
-

meta/recipes-core/busybox/busybox_1.21.1.bb

@@ -24,7 +24,6 @@ SRC_URI = "http://www.busybox.net/downloads/busybox-${PV}.tar.bz2;name=tarball \
            file://umount.busybox \
            file://defconfig \
            file://stat-usr-bin.patch \
-           file://su-usr-bin.patch \
            file://busybox-syslog.service.in \
            file://busybox-klogd.service.in \
            file://testsuite-du-du-k-works-fix-false-positive.patch \