[stm32f429i-discovery] Moved Chucks usart irq example to usart irq console.

Chucks irq example is more elaborate than the ported one so we keep
both.

Author: esden

examples/stm32/f4/stm32f4-disco/usart-irq/Makefile renamed to examples/stm32/f4/stm32f429i-discovery/usart_irq_console/Makefile

@@ -17,7 +17,7 @@
 
 OBJS = clock.o
 
-BINARY = usart-irq
+BINARY = usart_irq_console
 
 # Example showing how to generate a map file.
 LDFLAGS += -Wl,--Map=$(BINARY).map