boards: stm32f4discovery: Update usbnsh/defconfig

Summary:
- Enable CONFIG_DEBUG_SYMBOLS and CONFIG_DEBUG_FULLOPT
- Add CONFIG_EXAMPLES_HELLO=y
- Remove CONFIG_HOST_WINDOWS=y
- Enable CONFIG_RAMLOG and CONFIG_RAMLOG_SYSLOG
- Add CONFIG_STACK_COLORATION=y

Impact:
- stm32f4discovery:usbnsh only

Testing:
- Tested with stm32f4discovery board

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

boards/arm/stm32/stm32f4discovery/configs/usbnsh/defconfig

@@ -22,10 +22,12 @@ CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
 CONFIG_CDCACM_RXBUFSIZE=256
 CONFIG_CDCACM_TXBUFSIZE=256
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_EXAMPLES_HELLO=y
 CONFIG_FS_PROCFS=y
 CONFIG_HAVE_CXX=y
 CONFIG_HAVE_CXXINITIALIZE=y
-CONFIG_HOST_WINDOWS=y
 CONFIG_IDLETHREAD_STACKSIZE=2048
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MAX_TASKS=16
@@ -37,12 +39,16 @@ CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_LINELEN=64
 CONFIG_NSH_READLINE=y
 CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAMLOG=y
+CONFIG_RAMLOG_BUFSIZE=4096
+CONFIG_RAMLOG_SYSLOG=y
 CONFIG_RAM_SIZE=114688
 CONFIG_RAM_START=0x20000000
 CONFIG_RAW_BINARY=y
 CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_WAITPID=y
 CONFIG_SDCLONE_DISABLE=y
+CONFIG_STACK_COLORATION=y
 CONFIG_START_DAY=27
 CONFIG_START_YEAR=2013
 CONFIG_STM32_JTAG_SW_ENABLE=y
@@ -50,8 +56,6 @@ CONFIG_STM32_OTGFS=y
 CONFIG_STM32_PWR=y
 CONFIG_STM32_SPI1=y
 CONFIG_STM32_USART2=y
-CONFIG_SYSLOG_CHAR=y
-CONFIG_SYSLOG_DEVPATH="/dev/ttyS0"
 CONFIG_SYSTEM_NSH=y
 CONFIG_USBDEV=y
 CONFIG_USER_ENTRYPOINT="nsh_main"