linux/generate-cve-exclusions: show the name and version of the data source

Add another comment to state what the data source for the CVE data was,
specifically the basename of the repository and the "git describe" output
of HEAD.

(From OE-Core rev: 5e66e2b79faec2285d249b16457ecc63c4042444)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-kernel/linux/generate-cve-exclusions.py

@@ -11,6 +11,7 @@ import json
 import pathlib
 import os
 import glob
+import subprocess
 
 from packaging.version import Version
 
@@ -92,13 +93,16 @@ def main(argp=None):
     parser.add_argument("version", type=Version, help="Kernel version number to generate data for, such as 6.1.38")
 
     args = parser.parse_args(argp)
-    datadir = args.datadir
+    datadir = args.datadir.resolve()
     version = args.version
     base_version = Version(f"{version.major}.{version.minor}")
 
+    data_version = subprocess.check_output(("git", "describe", "--tags", "HEAD"), cwd=datadir, text=True)
+
     print(f"""
 # Auto-generated CVE metadata, DO NOT EDIT BY HAND.
-# Generated at {datetime.datetime.now(datetime.timezone.utc)} for version {version}
+# Generated at {datetime.datetime.now(datetime.timezone.utc)} for kernel version {version}
+# From {datadir.name} {data_version}
 
 python check_kernel_cve_status_version() {{
     this_version = "{version}"