Tools: remove -ftrapping-math as it cause SITL to crash

[timtuxworth]

adding -ftrapping-math causes SITL to crash on startup on my M1 Mac running Tahoe 26.1. Reverting #31346

The crash is an Abort Trap: 6 SIGABRT throwing EXC_BAD_ACCESS at

ardupilot/libraries/AP_Logger/AP_Logger.cpp

Line 1264 in 54f1b3d

for (uint16_t i=0; i<_num_types;i++) {

due to _num_types not being initialized.

which is called from here

ardupilot/libraries/AP_Logger/AP_Logger_Backend.cpp

Line 388 in 86c8eb0

const struct LogStructure *s = _front.structure_for_msg_type(type);

where _front is null at the time it is called.

This is the dump of what happens when it runs

+ /Users/tim/ardupilot/master/build/sitl/bin/arduplane --speedup 1 --instance 1 --home -35.36274643,149.16513199,585,353.8 --model plane --serial0 mcast: --defaults /Users/tim/ardupilot/master/Tools/autotest/models/plane.parm
Setting SIM_SPEEDUP=1.000000
Home: -35.362746 149.165132 alt=585.000000m hdg=353.799988
Starting sketch 'ArduPlane'
Starting SITL input
Using Irlock at port : 9015
UDP multicast connection 239.255.145.50:14550
Loaded defaults from /Users/tim/ardupilot/master/Tools/autotest/models/plane.parm
bind port 5772 for SERIAL1
SERIAL1 on TCP port 5772
bind port 5773 for SERIAL2
SERIAL2 on TCP port 5773
Smoothing reset at 0.001
validate_structures:538: Validating structures
ERROR: segmentation fault - aborting
Running: sh dumpstack.sh 41356 >dumpstack.sh_nknown.41356.out 2>&1
Failed
Running: sh dumpcore.sh 41356 >dumpcore.sh_nknown.41356.out 2>&1
Failed
/Users/tim/.local/bin/dual_plane1.sh: line 40: 41356 Abort trap: 6           $PLANE --speedup 1 --instance 1 --home $LOC1 --model plane --serial0 $SERIAL0 --defaults $PLANE_DEFAULTS
[2025-12-16-22:15 /Users/tim/ardupilot/master (scripted-oa)]$

This is what it looks like in VSCode

[andyp1per]

I think we should bring this in given that it looks like we didn't test the original PR on mac