Changed stm32f401 to stm32f411
Merge pull request #430 from 23chrischen/master

[NUCLEO_F411RE] Naming corrections - Changed stm32f401 to stm32f411
Merge branch 'master' of github.com:mbedmicro/mbed
[LPC1549] Add support for GCC_ARM
[LPC1549][GCC_ARM] Add export functionality