chore: kernel-src 归项目目录，更新路径与 gitignore

README.md

@@ -51,6 +51,6 @@
 - Windows 3.5mm / CoolStar：[audio_topology/OPERATION_Windows_Audio.md](audio_topology/OPERATION_Windows_Audio.md)
 - Linux SOF / intel-signed 固件：[audio_topology/OPERATION_Force_Intel_Signed_Firmware.md](audio_topology/OPERATION_Force_Intel_Signed_Firmware.md)
 - 三平台对比分析：[audio_topology/ANALYSIS_Audio.md](audio_topology/ANALYSIS_Audio.md)
-- Ubuntu HWE 6.17 内核：打补丁与编译（需本机 `sudo apt` 一次）— [scripts/ubuntu-hwe-617-build.sh](scripts/ubuntu-hwe-617-build.sh)、依赖列表 [scripts/ubuntu-hwe-617-deps-packages.txt](scripts/ubuntu-hwe-617-deps-packages.txt)
+- Ubuntu HWE 6.17 内核：源码目录 **`kernel-src/linux-hwe-6.17-6.17.0/`**（大文件不提交，见 [kernel-src/README.md](kernel-src/README.md)）；实验补丁 `patches/ubuntu-hwe-6.17/0002-*.patch`、脚本 [scripts/ubuntu-hwe-617-build.sh](scripts/ubuntu-hwe-617-build.sh)、依赖 [scripts/ubuntu-hwe-617-deps-packages.txt](scripts/ubuntu-hwe-617-deps-packages.txt)、摘要 [patches/ubuntu-hwe-6.17/DIFF_SUMMARY.txt](patches/ubuntu-hwe-6.17/DIFF_SUMMARY.txt)
 - **换机交接 / 进度与两处内核源码下载**：[docs/WORK_PROGRESS.md](docs/WORK_PROGRESS.md)