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Example target configuration change for NUCLEO-F411RE

To enable support for bootloader compilation (ARMCC compiler):

diff --git a/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F411xE/device/TOOLCHAIN_ARM_STD/stm32f411re.sct b/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F411xE/device/TOOLCHAIN_ARM_STD/stm32f411re.sct
index c018724..b8e8b03 100644
--- a/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F411xE/device/TOOLCHAIN_ARM_STD/stm32f411re.sct
+++ b/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F411xE/device/TOOLCHAIN_ARM_STD/stm32f411re.sct
@@ -1,3 +1,4 @@
+#! armcc -E
 ; Scatter-Loading Description File
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ; Copyright (c) 2014, STMicroelectronics
@@ -27,10 +28,18 @@
 ; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

+#if !defined(MBED_APP_START)
+  #define MBED_APP_START 0x08000000
+#endif
+
+#if !defined(MBED_APP_SIZE)
+  #define MBED_APP_SIZE 0x80000
+#endif
+
 ; STM32F411RE: 512 KB FLASH (0x80000) + 128 KB SRAM (0x20000)
-LR_IROM1 0x08000000 0x80000  {    ; load region size_region
+LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region

-  ER_IROM1 0x08000000 0x80000  {  ; load address = execution address
+  ER_IROM1 MBED_APP_START MBED_APP_SIZE  {  ; load address = execution address
    *.o (RESET, +First)
    *(InRoot$$Sections)
    .ANY (+RO)

Set MBED_APP_START to point to the starting address of flash memory. MBED_APP_SIZE defines the size of an application image in ROM. This information is available in the target-specific datasheet.