feat: added commit hash

tools/add_build_commit.py

@@ -0,0 +1,16 @@
+import subprocess
+Import("env")
+
+try:
+  commit_hash = "undefined"
+  result = subprocess.check_output(
+    ["git", "rev-parse", "--short", "HEAD"]
+  )
+  commit_hash = result.decode("utf-8").strip()
+  env.Append(
+    CPPDEFINES=[
+      ("BUILD_COMMIT", '\\"{}\\"'.format(commit_hash))
+    ]
+  )
+except Exception as error:
+  print("Failed to get commit hash: {}".format(error))