Fix compiler detection for avr-gcc with -std=gnu99

Jack

2017-02-21 fb2ee796938f75527571252128a306ba7658871a

 examples/common/scpi-def.h

@@ -25,5 +25,5 @@

scpi_result_t SCPI_SystemCommTcpipControlQ(scpi_t * context);

#endif // __SCPI_DEF_H_
#endif /* __SCPI_DEF_H_ */