cmake: fix handling of transitive zstd dependency

- Remove ZIG_ENABLE_ZSTD in favour of allowing ZIG_STATIC_ZSTD to be toggled off explicitly when ZIG_STATIC is on
- Remove ZIG_ENABLE_LIBCPP (now unused)
f5135f8e3bkcbanner committed on 1/5/2023, 2:45:06 AMparent88e4422
1 file changedLine totals unavailable