Make room on stm32f07 for tickless

Decrease the interrupt stack from 2k down to 1k so there is enough
ram to build all the tests with tickless enabled. In general, targets
should not need an interrupt stack greater than 1k with mbed-os.

Author: c1728p9

targets/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F070RB/device/TOOLCHAIN_IAR/stm32f070xb.icf

@@ -9,7 +9,7 @@ define symbol __ICFEDIT_region_ROM_end__   = 0x0801FFFF;
 define symbol __ICFEDIT_region_RAM_start__ = 0x200000C0;
 define symbol __ICFEDIT_region_RAM_end__   = 0x20003FFF;
 /*-Sizes-*/
-define symbol __ICFEDIT_size_cstack__ = 0x800;
+define symbol __ICFEDIT_size_cstack__ = 0x400;
 define symbol __ICFEDIT_size_heap__   = 0x1000;
 /**** End of ICF editor section. ###ICF###*/
 

targets/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F072RB/device/TOOLCHAIN_IAR/stm32f072xb.icf

@@ -9,7 +9,7 @@ define symbol __ICFEDIT_region_ROM_end__   = 0x0801FFFF;
 define symbol __ICFEDIT_region_RAM_start__ = 0x200000C0;
 define symbol __ICFEDIT_region_RAM_end__   = 0x20003FFF;
 /*-Sizes-*/
-define symbol __ICFEDIT_size_cstack__ = 0x800;
+define symbol __ICFEDIT_size_cstack__ = 0x400;
 define symbol __ICFEDIT_size_heap__   = 0x1000;
 /**** End of ICF editor section. ###ICF###*/