Add NUCLEO_F401RE in uvision exporter, change flash prog to stlink for F103RB
[NUCLEO_F401RE] Correction in GPIO setting (wrong macro used).
[NUCLEO_F103RB] Correction in SPI clock setting.
Merge pull request #162 from bcostm/master

[NUCLEO_F401RE] Corrections in uvision exporter, GPIOs setting and SPI.