pkgconf: Cross-building is now supported with the new Meson configuration

[jave27]

Specify library name and version: pkgconf/1.9.3

After #15990, pkgconf can support cross-building. Removed the validate() message, and confirmed on MacOS that builds work for both x86_64 and arm64.

---

• I've read the contributing guidelines.
• I've used a recent Conan client version close to the currently deployed.
• I've tried at least one configuration locally with the conan-center hook activated.

[ghost]

I detected other pull requests that are modifying pkgconf/all recipe:

• pkgconf: conan v2 support & allow cross-build in the meantime #12219

This message is automatically generated by https://github.com/ericLemanissier/conan-center-conflicting-prs so don't hesitate to report issues/improvements there.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 2 (9479ca09249a8a41c1afc43d7bb4a9ee80c933d0):

• pkgconf/1.9.3@:
  All packages built successfully! (All logs)

• pkgconf/1.7.4@:
  All packages built successfully! (All logs)

• pkgconf/1.7.3@:
  All packages built successfully! (All logs)

---

Conan v2 pipeline (informative, not required for merge) ✔️

Note: Conan v2 builds are informative and they are not required for the PR to be merged.

All green in build 2 (9479ca09249a8a41c1afc43d7bb4a9ee80c933d0):

• pkgconf/1.7.3@:
  All packages built successfully! (All logs)

• pkgconf/1.9.3@:
  All packages built successfully! (All logs)

• pkgconf/1.7.4@:
  All packages built successfully! (All logs)

[jcar87]

Hi @jave27 thanks so much for your contribution.