Fixes building gcc-8.5.0 on libc6 version 2.36 (at least).
Fixes this error:
  configure: error: in `.../parts/gcc-8.5/.build/gcc-8.5.0':
  configure: error: C compiler cannot create executables
  See `config.log' for more details.
relevant config.log extract:
  configure:4326: gcc   -Wl,-rpath=.../parts/gmp/lib -Wl,-rpath=.../parts/isl/lib -Wl,-rpath=.../parts/mpc/lib -Wl,-rpath=.../parts/mpfr/lib conftest.c  >&5
  .../parts/binutils/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: unknown type [0x13] section `.relr.dyn'