Name of exit function in exit.c

Change the name of the exit function to _exit as suggested in clib
documenation for all gcc_arm toolchains (GCC_ARM and CoIDE)
Modified Terminal setting for New GR-PEACH.

Modified Terminal setting of Ethernet and LED PIN for New GR-PEACH.
Added IAR Export RTOS CORTEX M3
Added IAR Export RTOS CORTEX M3
IAR exporter Rtos clean
[NUCLEO_F0] Add PeripheralPins files
[NUCLEO_F103RB] Add PeripheralPins files
[NUCLEO_F3] Add PeripheralPins files
[NUCLEO_F4] Add note on optional pins
[NUCLEO_L0/L1] Add PeripheralPins files
Fixed LPC1768 NVIC placement space in RAM
removed comments and fixed USB_RAM section
[NUCLEO_L053R8] Correct issue with Travis build
Merge pull request #738 from bcostm/master

Targets: NUCLEOs - Add PeripheralPins files for all nucleo targets
Merge pull request #711 from ohagendorf/_exit-or-exit

mbed: Name of exit function in exit.c for GCC ARM (_exit)
Merge pull request #739 from xiongyihui/master

Targets: ARCH_MAX & DISCO_F407VG - Add SystemCoreClockUpdate and HAL_Init to mbed_sdk_init
Delete old version terminal setting code.

We confirmed that user never use the old version GR-PEACH.
So, we deleted old version terminal setting code.
Merge pull request #733 from masaohamanaka/master

Targets: RZ_A1H - Modified Terminal setting for New GR-PEACH.
Merge pull request #736 from GustavWi/iar_mbed

RTOS:  IAR Export for CORTEX M3
IAR Fixed NVIC RAM Vector space for NXP targets