Install openblas for check() in a fresh build container

makepkg's upfront dependency install covers only pkgbase-level arrays, so the
per-package openblas depends never reach a fresh container and check()'s
mlx.core import failed with a missing libopenblas.so.0. Declare it as a
checkdepends instead; real installs still get it through depends.

pkgbuilds/omarchy-mlx/PKGBUILD

@@ -17,6 +17,10 @@ _mesa_sha=${_mesa_commit:0:10}
 makedepends=('clang' 'elfutils' 'expat' 'glslang' 'libclc' 'libdrm' 'llvm' 'meson'
              'python' 'python-mako' 'python-packaging' 'python-yaml'
              'spirv-llvm-translator' 'spirv-tools' 'zstd')
+# check() imports the staged venv's mlx.core, which dlopens libopenblas.so.0.
+# Per-package depends are not installed at check() time in a fresh makepkg
+# container, so the library must arrive through a pkgbase-level checkdepends.
+checkdepends=('openblas')
 options=('!debug' '!lto')
 source=("omarchy-mlx-$pkgver.tar.gz::$url/archive/refs/tags/v$pkgver.tar.gz"
         "$_wheel::$url/releases/download/v$pkgver/${_wheel//+/%2B}"