iproute2: de-bash its scripts to remove the bash dependency

If we build a minimal image with iproute2 installed, the following
error will appear during rootfs.

error: Can't install iproute2-3.10.0-r0.0@i586: no package provides /bin/bash

The problem is that iproute2 has an implicit dependency on 'bash'.
This dependency is from per-file dependency checking.

Patch two scripts, ifcfg and rtpr, from iproute2 to remove the bash
specific syntax.

[YOCTO #5415]

(From OE-Core master rev: 1132c4210eddd59b22b2640935ab0bb8f48c0124)

(From OE-Core rev: ca55e7321f0c52fbe13d301d0dfe3adff5435639)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/iproute2/iproute2/0001-iproute2-de-bash-scripts.patch

@@ -0,0 +1,64 @@
+Subject: [PATCH] iproute2: de-bash scripts
+
+de-bash these two scripts to make iproute2 not depend on bash.
+
+Upstream-Status: Pending
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+
+---
+ ip/ifcfg |   15 ++++++++-------
+ ip/rtpr  |    2 +-
+ 2 files changed, 9 insertions(+), 8 deletions(-)
+
+diff --git a/ip/ifcfg b/ip/ifcfg
+index 083d9df..60bcf1f 100644
+--- a/ip/ifcfg
++++ b/ip/ifcfg
+@@ -1,12 +1,13 @@
+-#! /bin/bash
++#! /bin/sh
+ 
+ CheckForwarding () {
+-  local sbase fwd
++  local sbase fwd forwarding
+   sbase=/proc/sys/net/ipv4/conf
+   fwd=0
+   if [ -d $sbase ]; then
+     for dir in $sbase/*/forwarding; do
+-      fwd=$[$fwd + `cat $dir`]
++      forwarding=`cat $dir`
++      fwd=$(($fwd+$forwarding))
+     done
+   else
+     fwd=2
+@@ -127,12 +128,12 @@ fi
+ arping -q -A -c 1 -I $dev $ipaddr
+ noarp=$?
+ ( sleep 2 ;
+-  arping -q -U -c 1 -I $dev $ipaddr ) >& /dev/null </dev/null &
++  arping -q -U -c 1 -I $dev $ipaddr ) > /dev/null 2>&1 </dev/null &
+ 
+-ip route add unreachable 224.0.0.0/24 >& /dev/null
+-ip route add unreachable 255.255.255.255 >& /dev/null
++ip route add unreachable 224.0.0.0/24 > /dev/null 2>&1
++ip route add unreachable 255.255.255.255 > /dev/null 2>&1
+ if [ `ip link ls $dev | grep -c MULTICAST` -ge 1 ]; then
+-  ip route add 224.0.0.0/4 dev $dev scope global >& /dev/null
++  ip route add 224.0.0.0/4 dev $dev scope global > /dev/null 2>&1
+ fi
+ 
+ if [ $fwd -eq 0 ]; then
+diff --git a/ip/rtpr b/ip/rtpr
+index c3629fd..674198d 100644
+--- a/ip/rtpr
++++ b/ip/rtpr
+@@ -1,4 +1,4 @@
+-#! /bin/bash
++#! /bin/sh
+ 
+ exec tr "[\\\\]" "[
+ ]"
+-- 
+1.7.9.5
+

meta/recipes-connectivity/iproute2/iproute2_3.10.0.bb

@@ -2,6 +2,7 @@ require iproute2.inc
 
 SRC_URI = "${KERNELORG_MIRROR}/linux/utils/net/${BPN}/${BPN}-${PV}.tar.xz \
            file://configure-cross.patch \
+           file://0001-iproute2-de-bash-scripts.patch \
           "
 
 SRC_URI[md5sum] = "45fb5427fc723a0001c72b92c931ba02"