fix root dir .gitignore

Signed-off-by: carbon <carbon@milkv.io>

.gitignore

@@ -1,21 +1,22 @@
-build
-freertos
-fsbl
-host-tools
-isp_tuning
-linux_5.10
-middleware
-opensbi
-osdrv
-ramdisk
-u-boot-2021.10
-buildroot-2021.05
-oss
-cviruntime
-cvikernel
-cvimath
-cvibuilder
-cnpy
-flatbuffers
-install
 
+install/
+out/
+
+host-tools
+host-tools/
+
+*~
+*.swp
+*.swo
+*.bak
+*.rej
+.DS_Store
+
+tags
+.tags*
+cscope.*
+ncscope.*
+.svim
+
+__pycache__
+.vscode