add ignore files

.gitignore

@@ -5,6 +5,7 @@
 **/MDK-ARM/stm32f103c8t6/**
 **/MDK-ARM/stm32f429igt6/**
 **/MDK-ARM/stm32h743vbt6/**
+**/MDK-ARM/stm32h743xih6/**
 **/obj/**
 **/RET/**
 **/Listings/**