Update to the 20210218 snapshot of GCC 8.4.1.
ALso back port part of r565301 | gerald | 2021-02-15 from
lang/gcc11-devel:
Explicitly build --without-zstd such that archivers/zstd isn't pulled in inadvertedly when present in the build system even though it is not an explicit dependency. [1]
PR: 253286 [1]