/usr/lib/llvm-4.0/include/lldb/Breakpoint/ is in liblldb-4.0-dev 1:4.0.1-10~deb9u2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/llvm-4.0/include/lldb/Breakpoint/Breakpoint.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointID.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointIDList.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointList.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointLocation.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointLocationCollection.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointLocationList.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointOptions.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointResolver.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointResolverAddress.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointResolverFileLine.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointResolverFileRegex.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointResolverName.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointSite.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/BreakpointSiteList.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/Stoppoint.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/StoppointCallbackContext.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/StoppointLocation.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/Watchpoint.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/WatchpointList.h
/usr/lib/llvm-4.0/include/lldb/Breakpoint/WatchpointOptions.h