OP-719: fix +x for openpilotgcs on linux

Signed-off-by: James Cotton <peabody124@gmail.com>
Vtol Path Follower: Add octocoax support
PIOS SPI: Called malloc instead of pvPortMalloc

Thanks for Hyper catching this
Stabilization: fix weird bug that sets variables twice

Obviously some old code got left over
SystemMod; make sure for low loads CPULoad never goes negative

This wrapped around to 255 load which set alarms inappropriately.
pios: replaced all occurrences of malloc with pvPortMalloc
test logfs: replaced malloc with pvPortMalloc
Merge pull request #1 from lilvinz/malloc_fixes

Malloc fixes
VtolFollower: reorder frame types to be more sensible
Merge pull request #498 from peabody124/misc_fixes

Misc fixes