This patch fixes an issue in libcxx/utils/gdb/libcxx/printers.py.
With gdb 17 (binutils 2_44) pretty-printers do not work anymore because
calls to `gdb.printing` requires `import gdb.printing` statement, which
was missing from the `printers.py`.
This was broken after commit https://github.com/bminor/binutils-gdb/commit/fc14343205d3a
and `import gdb.printing` was first referenced in https://github.com/bminor/binutils-gdb/commit/ee06c79b0f.
Co-authored-by: Dmitry Chestnykh <dm.chestnykh@gmail.com>
a53003fe23