stm32 port: Decrease U_CFG_TEST_HEAP_MIN_FREE_BYTES
With the wifi driver there are now more AT command tasks with some AT
printouts resulting in newlib memory leaks. Until we have some
mitigation for this memory leak (see we will need to keep
adjusting U_CFG_TEST_HEAP_MIN_FREE_BYTES.
* a task that is created and deleted but if _you_ do you should note
* this problem and probably never delete the task.
*/
-#define U_CFG_TEST_HEAP_MIN_FREE_BYTES (1024 * 45)
+#define U_CFG_TEST_HEAP_MIN_FREE_BYTES (1024 * 35)
/* ----------------------------------------------------------------
* COMPILE-TIME MACROS: OS RELATED
