e22f9f5676 removed all the old binary test
files, leaving broken symlinks in hfuzz_workspace. This commit adds the
source files for generating them from scratch.
This commit also replaces toml_edit with toml since the former cannot
deserialize u64 values.
Fixes: #532
Signed-off-by: Andrew Gunnerson <accounts+github@chiller3.com>
Andrew Gunnerson