Update .gitignore with *.bak pattern

Jan Breuer

2015-08-06 f2ccc82183c201fa7b2f427a5e81eccba656774b

 examples/common/scpi-def.h

@@ -9,7 +9,6 @@
int SCPI_Error(scpi_t * context, int_fast16_t err);
scpi_result_t SCPI_Control(scpi_t * context, scpi_ctrl_name_t ctrl, scpi_reg_val_t val);
scpi_result_t SCPI_Reset(scpi_t * context);
scpi_result_t SCPI_Test(scpi_t * context);
scpi_result_t SCPI_Flush(scpi_t * context);