libultrahdr: Restrict meta.platforms

Upstream only allows specific target OS' and architectures. Adjust meta.platforms to reflect what upstream allows, to allow
reverse deps to use lib.meta.availableOn for deciding if they should depend on this.

pkgs/by-name/li/libultrahdr/package.nix

@@ -102,7 +102,33 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [
       yzx9
     ];
-    platforms = lib.platforms.all;
+    # CMake script rejects non-approved platform targets
+    # https://github.com/google/libultrahdr/pull/383 would get rid of that
+    platforms =
+      let
+        # Values from the "Detect system" section in /CMakeLists.txt
+        # https://github.com/google/libultrahdr/blob/d52a0d13814ca399fc8a07e23de1d2c63f0e8404/CMakeLists.txt#L34
+        oss = [
+          "linux"
+          "windows"
+          "darwin"
+        ];
+        archs = [
+          "i686"
+          "x86_64"
+          "aarch64"
+          "armv7l"
+          "riscv64"
+          "riscv32"
+          "loongarch64"
+        ];
+      in
+      lib.lists.intersectLists lib.platforms.all (
+        lib.lists.crossLists (arch: os: "${arch}-${os}") [
+          archs
+          oss
+        ]
+      );
     license = with lib.licenses; [
       asl20
     ];