fix: 修复 CMake CheckLinkerFlag 路径问题

- 在 init.sh 中添加对 cmake/CheckLinkerFlag.cmake 的修复
- 将 ${monero_SOURCE_DIR} 替换为 ${CMAKE_SOURCE_DIR}
- 解决 CI 构建中找不到 CheckLinkerFlag.c 的问题

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

init.sh

@@ -8,6 +8,9 @@ sed -i 's/project(monero)/project(mond)/' CMakeLists.txt
 # 2. Modify daemon CMakeLists.txt - Change output binary name
 sed -i 's/OUTPUT_NAME "monerod"/OUTPUT_NAME "mond"/' src/daemon/CMakeLists.txt
 
+# 2.5. Modify cmake/CheckLinkerFlag.cmake - Fix source directory variable
+sed -i 's/\${monero_SOURCE_DIR}/\${CMAKE_SOURCE_DIR}/' cmake/CheckLinkerFlag.cmake
+
 # 3. Modify version.cpp.in - Change all MONERO to MOND
 sed -i 's/DEF_MONERO_VERSION_TAG/DEF_MOND_VERSION_TAG/' src/version.cpp.in
 sed -i 's/DEF_MONERO_VERSION "/DEF_MOND_VERSION "/' src/version.cpp.in