* extends VPP's message definition language with the following syntax:
u32 count:
u8 array[count];
which is traslated to:
u32 count;
u8 array[0];
but now, python API representation generated by vppapigen
contains information about where the array length is stored.
* modifies existing response messages to use the new syntax
Change-Id: I68210bc7a3a755d03d067e9b79a567f40e2d31f3
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>