/usr/lib/ is in gdb-arm-none-eabi 7.10-1ubuntu3+9.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/arm-none-eabi/
/usr/lib/arm-none-eabi/share/
/usr/lib/arm-none-eabi/share/gdb/
/usr/lib/arm-none-eabi/share/gdb/python/
/usr/lib/arm-none-eabi/share/gdb/python/gdb/
/usr/lib/arm-none-eabi/share/gdb/python/gdb/FrameIterator.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/frames.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/unwinder.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/printer/
/usr/lib/arm-none-eabi/share/gdb/python/gdb/printer/__init__.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/printer/bound_registers.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/xmethod.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/command/
/usr/lib/arm-none-eabi/share/gdb/python/gdb/command/xmethods.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/command/pretty_printers.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/command/frame_filters.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/command/prompt.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/command/explore.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/command/unwinders.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/command/__init__.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/command/type_printers.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/FrameDecorator.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/prompt.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/__init__.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/function/
/usr/lib/arm-none-eabi/share/gdb/python/gdb/function/caller_is.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/function/strfns.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/function/__init__.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/types.py
/usr/lib/arm-none-eabi/share/gdb/python/gdb/printing.py
/usr/lib/arm-none-eabi/share/gdb/syscalls/
/usr/lib/arm-none-eabi/share/gdb/syscalls/gdb-syscalls.dtd
/usr/lib/arm-none-eabi/share/gdb/syscalls/sparc64-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/sparc-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/aarch64-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/amd64-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/i386-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/mips-n32-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/arm-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/s390x-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/ppc64-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/ppc-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/s390-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/mips-o32-linux.xml
/usr/lib/arm-none-eabi/share/gdb/syscalls/mips-n64-linux.xml
/usr/lib/arm-none-eabi/share/gdb/system-gdbinit/
/usr/lib/arm-none-eabi/share/gdb/system-gdbinit/elinos.py
/usr/lib/arm-none-eabi/share/gdb/system-gdbinit/wrs-linux.py