[PATCH v2] gen_compile_commands: fix missing 'sys' package

[Kortan <kortanzh@xxxxxxxxx>]

We need to import the 'sys' package since the script has called
sys.exit() method.

Signed-off-by: Kortan <kortanzh@xxxxxxxxx>
---
Changes v1 -> v2:
* Fix commit title.
* Improve commit message. 

 scripts/clang-tools/gen_compile_commands.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/clang-tools/gen_compile_commands.py b/scripts/clang-tools/gen_compile_commands.py
index 0033eedce003..1d1bde1fd45e 100755
--- a/scripts/clang-tools/gen_compile_commands.py
+++ b/scripts/clang-tools/gen_compile_commands.py
@@ -13,6 +13,7 @@ import logging
 import os
 import re
 import subprocess
+import sys
 
 _DEFAULT_OUTPUT = 'compile_commands.json'
 _DEFAULT_LOG_LEVEL = 'WARNING'
-- 
2.33.0