runltp: fix the wrong parsing -b option

Maybe a typo when replacing DEVICE_FS_TYPE.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Reviewed-by: Garrett Cooper <yanegomi@gmail.com>
diff --git a/runltp b/runltp
index 3bd5252..0d77a6e 100755
--- a/runltp
+++ b/runltp
@@ -683,7 +683,7 @@
         sed -i "s|DEVICE|$DEVICE|"  ${TMP}/alltests
     else
         echo "remove test cases which require the block device."
-    echo "You can specify it with option -b"
+        echo "You can specify it with option -b"
         sed -i "/DEVICE/d"  ${TMP}/alltests
     fi
 
@@ -719,7 +719,7 @@
     fi
 
     if [ -n "$DEVICE" ]; then
-        sed -i "" -e "s|DEVICE_FS_TYPE|$DEVICE_FS_TYPE|"  ${TMP}/alltests
+        sed -i "s|DEVICE_FS_TYPE|$DEVICE_FS_TYPE|"  ${TMP}/alltests
     fi
 
     if [ $? -ne 0 ]; then