[dlib/sys/time.h] Fix iar version problem
[bsp/stm32f429-apollo/applications/SConscript] Remove CPPDEFINES

Fix the project generation issue in vs2012.py.

应该使用utils对象

gui 引擎优化提交

[DeviceDrivers] fix type unknown issue in pipe

[BSP] Update project files.

[BSP]NUC472 增加网络驱动

[bsp] Add keyboard and mouse driver for qemu-vexpress-a9

1. code cleanup for Kconfig.
2. fix the compiling warning for BYTE_ORDER.

1. Use float type for clock_cpu_getres() return value;
2. Add clock_cpu_microsecond/millisecond APIs.

re-write for #1138

update Kconfig

[bsp]修复qemu-vexpress-a9 SD卡不能多块读写的BUG