nuttx-ci-linux: Install libpython2.7 for xtensa-esp32-elf-gdb (again)

This time to the correct apt-get line.

root@5b2362eb60c2:/src/nuttx# ldd /tools/xtensa-esp32-elf-gcc/bin/xtensa-esp32-elf-gdb
        linux-vdso.so.1 (0x00007ffeb59f3000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f2a7fc31000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f2a7fc0e000)
        libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007f2a7fc09000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f2a7faba000)
        libpython2.7.so.1.0 => /lib/x86_64-linux-gnu/libpython2.7.so.1.0 (0x00007f2a7f74e000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f2a7f55c000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f2a7fc3f000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f2a7f53e000)
root@5b2362eb60c2:/src/nuttx#
1 file changed
tree: 5fd8d77e4f8b8ab6a1cbd31da30813b6c0cd0cec
  1. .github/
  2. docker/
  3. testlist/
  4. .asf.yaml
  5. cibuild.sh
  6. README.md
README.md

incubator-nuttx-testing