Cortex-m Size bump by 1.5KiB (#13064)

Tiny (236b) overflow after #12987 which adds safety related checks.

Failure -
https://github.com/pytorch/executorch/actions/runs/16622225895/job/47029216900#step:15:17147

Author: digantdesai

.github/workflows/trunk.yml

@@ -285,12 +285,12 @@ jobs:
         setup_script_args=""
         if [[ ${{ matrix.os}} == "bare_metal" ]]; then
           toolchain_prefix=arm-none-eabi-
-          threshold="109000"
+          threshold="110592" # 108 KiB
           toolchain_cmake=examples/arm/ethos-u-setup/arm-none-eabi-gcc.cmake
         elif [[ ${{ matrix.os}} == "zephyr-preset" ]]; then
           setup_script_args="--target-toolchain zephyr"
           toolchain_prefix=arm-zephyr-eabi-
-          threshold="135000"
+          threshold="135168" # 132 KiB
           toolchain_cmake=examples/zephyr/x86_64-linux-arm-zephyr-eabi-gcc.cmake
         else
           echo "Fail unsupport OS selection ${{ matrix.os }}"