[source] scripts/diffconfig.sh: fix output if TARGET_PER_DEVICE_ROOTFS is set

[LEDE Commits]

mkresin pushed a commit to source.git, branch master:
https://git.lede-project.org/82b8eaa89fb90a796552b1c54aa48bccad5adb30

commit 82b8eaa89fb90a796552b1c54aa48bccad5adb30
Author: Mathias Kresin <dev at kresin.me>
AuthorDate: Wed Oct 5 16:36:28 2016 +0200

    scripts/diffconfig.sh: fix output if TARGET_PER_DEVICE_ROOTFS is set
    
    diffconfig show packages selected as dependencies of
    TARGET_PER_DEVICE_ROOTFS as individual selected.
    
    Signed-off-by: Mathias Kresin <dev at kresin.me>
---
 scripts/diffconfig.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/diffconfig.sh b/scripts/diffconfig.sh
index bdaf1a1..5f9fec5 100755
--- a/scripts/diffconfig.sh
+++ b/scripts/diffconfig.sh
@@ -7,6 +7,7 @@ grep '^CONFIG_ALL_NONSHARED=y' .config >> tmp/.diffconfig.head
 grep '^CONFIG_DEVEL=y' .config >> tmp/.diffconfig.head
 grep '^CONFIG_TOOLCHAINOPTS=y' .config >> tmp/.diffconfig.head
 grep '^CONFIG_BUSYBOX_CUSTOM=y' .config >> tmp/.diffconfig.head
+grep '^CONFIG_TARGET_PER_DEVICE_ROOTFS=y' .config >> tmp/.diffconfig.head
 ./scripts/config/conf --defconfig=tmp/.diffconfig.head -w tmp/.diffconfig.stage1 Config.in >/dev/null
 ./scripts/kconfig.pl '>+' tmp/.diffconfig.stage1 .config >> tmp/.diffconfig.head
 ./scripts/config/conf --defconfig=tmp/.diffconfig.head -w tmp/.diffconfig.stage2 Config.in >/dev/null