[openwrt/openwrt] scripts/mkits.sh: replace echo -e with printf

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/907053193a1c64306247cc43b8677ce765933ca2

commit 907053193a1c64306247cc43b8677ce765933ca2
Author: Rosen Penev <rosenp at gmail.com>
AuthorDate: Sun Jan 5 18:31:17 2020 -0800

    scripts/mkits.sh: replace echo -e with printf
    
    echo flags are not POSIX. printf does the same with added \n.
    
    Signed-off-by: Rosen Penev <rosenp at gmail.com>
---
 scripts/mkits.sh | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/scripts/mkits.sh b/scripts/mkits.sh
index 32a978e18d..def3d3c7c2 100755
--- a/scripts/mkits.sh
+++ b/scripts/mkits.sh
@@ -15,18 +15,18 @@
 #
 
 usage() {
-	echo "Usage: $(basename $0) -A arch -C comp -a addr -e entry" \
-		"-v version -k kernel [-D name -d dtb] -o its_file"
-	echo -e "\t-A ==> set architecture to 'arch'"
-	echo -e "\t-C ==> set compression type 'comp'"
-	echo -e "\t-c ==> set config name 'config'"
-	echo -e "\t-a ==> set load address to 'addr' (hex)"
-	echo -e "\t-e ==> set entry point to 'entry' (hex)"
-	echo -e "\t-v ==> set kernel version to 'version'"
-	echo -e "\t-k ==> include kernel image 'kernel'"
-	echo -e "\t-D ==> human friendly Device Tree Blob 'name'"
-	echo -e "\t-d ==> include Device Tree Blob 'dtb'"
-	echo -e "\t-o ==> create output file 'its_file'"
+	printf "Usage: %s -A arch -C comp -a addr -e entry -v version"\
+		 "-k kernel [-D name -d dtb] -o its_file" "$(basename $0)"
+	printf "\n\t-A ==> set architecture to 'arch'"
+	printf "\n\t-C ==> set compression type 'comp'"
+	printf "\n\t-c ==> set config name 'config'"
+	printf "\n\t-a ==> set load address to 'addr' (hex)"
+	printf "\n\t-e ==> set entry point to 'entry' (hex)"
+	printf "\n\t-v ==> set kernel version to 'version'"
+	printf "\n\t-k ==> include kernel image 'kernel'"
+	printf "\n\t-D ==> human friendly Device Tree Blob 'name'"
+	printf "\n\t-d ==> include Device Tree Blob 'dtb'"
+	printf "\n\t-o ==> create output file 'its_file'\n"
 	exit 1
 }