wic: Document creation of empty partition

Added short explanation of how to create empty pattition
to the 'wic help kickstart' output.

[YOCTO #7131]

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

diff --git a/scripts/lib/image/help.py b/scripts/lib/image/help.py
index 14f0ff173a7eedc2382825c67e2ed708a337666e..adfe9767166da0979a39b563bb0ebee68536abbf 100644 (file)
--- a/scripts/lib/image/help.py
+++ b/scripts/lib/image/help.py
@@ -707,6 +707,10 @@ DESCRIPTION
                    up being are dependent on the given plugin
                    implementation.
 
+                   If --source option is not used, the wic command
+                   will create empty partition. --size parameter has
+                   to be used to specify size of empty partition.
+
          --ondisk or --ondrive: Forces the partition to be created on
                                 a particular disk.