This commit fixes memory leaks in unity tests when the debug option
CONFIG_FREERTOS_USE_LIST_DATA_INTEGRITY_CHECK_BYTES is enabled. The
commit increases the threshold to 1200 bytes from 1024 bytes.
* The unit tests are derived from the FreeRTOS test app
in components/freertos/test_apps/freertos. They are
quite incompatible with the main test application, which
is why they have been placed under
tools/test_apps/linux_compatible/linux_freertos for now.