Llvm, version bump and links fixed

[felipeasimos]

fixed writer, callconv and add use_llvm option.

I am aware there are already some redundant PRs with version bumps and fixes for 0.15.1/0.15.2 and master, but for it to work without LLVM we depend on fixes on zig itself. This PR apply the same fixes but also expose the use_llvm option to the cli so nobody (that is willing to use LLVM) is blocked for now.

When the fixes enter the next release and one of the other PRs here is merged I will close this one to avoid cluttering the PR tab.

[AverageTurtle]

you are my hero, thank you.

[felipeasimos]

The tags in the gfx-rs repo changed from v27.0.2 to v27.0.2.0, so fixing them and rehashing was necessary. Btw, I had to use this script to get the new entries (after extracting the correct links to a file). Does anybody know a better way to rehash this kind of stuff in the future? Just zig fetch --saveing the new links didn't work, even after removing the hashes from the build.zig.zon entries.

#!/usr/bin/env bash
set -euo pipefail

if [[ $# -ne 1 ]]; then
  echo "usage: $0 links.txt" >&2
  exit 1
fi

links_file="$1"

while IFS= read -r link || [[ -n "$link" ]]; do
  # Skip empty lines and comments
  [[ -z "$link" || "$link" =~ ^[[:space:]]*# ]] && continue

  # Get basename and normalize name
  base="$(basename "$link")"
  name="${base%.*}"
  name="${name%.tar}"
  name="${name%.gz}"
  name="${name%.xz}"
  name="${name%.zip}"
  name="${name//-/_}"

  # Run zig fetch and grab the final line as the hash
  hash="$(zig fetch --debug-hash "$link" | tail -n 1)"

  cat <<EOF
    .$name = .{
        .url = "$link",
        .hash = "$hash",
        .lazy = true,
    },
EOF

done < "$links_file"