This is xnu-4903.221.2. See this file in:
# Any level
BUILD/
build/
.DS_Store

# vim swap files
*~
*.swp

# JSON compilation definitions (for the YouCompleteMe vim plugin)
compile_commands.json

# /
/.remotebuild_credential
/cscope.*
/TAGS
/tags

# /libkern/c++/Tests/TestSerialization/test1/test1.xcodeproj/
/libkern/c++/Tests/TestSerialization/test1/test1.xcodeproj/xcuserdata

# /libkern/c++/Tests/TestSerialization/test2/test2.xcodeproj/
/libkern/c++/Tests/TestSerialization/test2/test2.xcodeproj/xcuserdata

# /libkern/kmod/libkmod.xcodeproj/
/libkern/kmod/libkmod.xcodeproj/xcuserdata

# /libsyscall/Libsyscall.xcodeproj/
/libsyscall/Libsyscall.xcodeproj/xcuserdata
/libsyscall/Libsyscall.xcodeproj/project.xcworkspace

# /tools/lldbmacros/
/tools/lldbmacros/*.pyc

# /tools/lldbmacros/core/
/tools/lldbmacros/core/*.pyc

# /tools/lldbmacros/plugins/
/tools/lldbmacros/plugins/*.pyc

# /tools/tests/perf_index/PerfIndex_COPS_Module/PerfIndex.xcodeproj/
/tools/tests/perf_index/PerfIndex_COPS_Module/PerfIndex.xcodeproj/xcuserdata

# /tools/tests/testkext/testkext.xcodeproj/
/tools/tests/testkext/testkext.xcodeproj/xcuserdata

# /tools/tests/unit_tests/cpu_monitor_tests_11646922_src/cpu_hog/cpu_hog.xcodeproj/
/tools/tests/unit_tests/cpu_monitor_tests_11646922_src/cpu_hog/cpu_hog.xcodeproj/xcuserdata

# /tools/tests/unit_tests/monitor_stress_12901965_src/monitor_stress.xcodeproj/
/tools/tests/unit_tests/monitor_stress_12901965_src/monitor_stress.xcodeproj/xcuserdata

# /tools/tests/unit_tests/monitor_stress_12901965_src/monitor_stress.xcodeproj/project.xcworkspace/
/tools/tests/unit_tests/monitor_stress_12901965_src/monitor_stress.xcodeproj/project.xcworkspace/xcuserdata

# /tools/tests/zero-to-n
/tools/tests/zero-to-n/zn*