Two comments name a variant and inventory paths that do not exist

[Nemo-010]

Two comments name something that is not what the code uses.

scripts/verify-artifacts.sh:303-305 writes the build variant into the manifest and explains it as:

# Which build variant this is. "default" reads APPDIR as well as
# CROSS_LIBC_DLOPEN_ROOT; "strictenv" reads only the latter.

The value written is "${CLD_VARIANT:-default}", and the variant scripts/build.sh sets is portable (VARIANT=portable), which is also the only other value scripts/package-release.sh:62 accepts. There is no strictenv variant. A consumer reading the manifest comment would look for a value that never appears.

tools/gen_forward_shim.py:11-14 documents its own invocation as:

python3 tools/gen_forward_shim.py \
    --floor  inv/appdir.json \
    --target inv/arch.json \
    --out    src/forward-shim.c \
    --manifest src/forward-shim-manifest.json

There is no inv/ directory; the inventories are inventories/appdir.json and inventories/glibc-2.44.json, and src/Makefile passes those. A reader who copies the docstring gets a missing-file error.

Fix both to the values and paths the tree actually uses.