Merge pull request #3452 from supperthomas/aa

[bsp/stm32] add the bsp of stm32l496zg-nucleo board

Author: BernardXiong

.travis.yml

@@ -112,6 +112,7 @@ env:
   - RTT_BSP='stm32/stm32l475-st-discovery' RTT_TOOL_CHAIN='sourcery-arm'
   - RTT_BSP='stm32/stm32l476-st-nucleo' RTT_TOOL_CHAIN='sourcery-arm'
   - RTT_BSP='stm32/stm32l496-ali-developer' RTT_TOOL_CHAIN='sourcery-arm'
+  - RTT_BSP='stm32/stm32l496-st-nucleo' RTT_TOOL_CHAIN='sourcery-arm'
   - RTT_BSP='stm32f20x' RTT_TOOL_CHAIN='sourcery-arm'
   - RTT_BSP='swm320-lq100' RTT_TOOL_CHAIN='sourcery-arm'
 #  - RTT_BSP='taihu' RTT_TOOL_CHAIN='sourcery-ppc'