GCS_MAVLink: allow FTP to be compiled out with build_options.py

[peterbarker]

pbarker@fx:~/rc/ardupilot(pr/ftp-out)$ ./Tools/scripts/size_compare_branches.py --board=CubeOrange --extra-hwdef-branch=/tmp/branch.hwdef --vehicle=plane --master=pr/ftp-out

yields

Board,plane
CubeOrange,-4696

[magicrub]

Looks fine, except when you say CubeOrange,-4696 you obviously mean it doesn't change anything for any build as-is but if you DID remove it... right?

[peterbarker]

Looks fine, except when you say CubeOrange,-4696 you obviously mean it doesn't change anything for any build as-is but if you DID remove it... right?

I'd stuffed up the markup in my initial comment showing the command-line used to generate the delta. Fixed the comment to show it.

[peterbarker]

No compiler output change by default:

Board                    AP_Periph  blimp  bootloader  copter  heli  iofirmware  plane  rover  sub
CubeOrange-periph-heavy  *                                                                     
Durandal                            *      *           *       *                 *      *      *
Hitec-Airspeed           *                                                                     
KakuteH7-bdshot                     *      *           *       *                 *      *      *
MatekF405                           *      *           *       *                 *      *      *
Pixhawk1-1M-bdshot                  *                  *       *                 *      *      *
f103-QiotekPeriph        *                                                                     
f303-Universal           *                                                                     
iomcu                                                                *                         
revo-mini                           *      *           *       *                 *      *      *
skyviper-v2450                                         *