mesa: only build with valgrind if available on host platform (#337065)

pkgs/development/libraries/mesa/default.nix

@@ -40,6 +40,7 @@
 , xorg
 , zstd
 , enablePatentEncumberedCodecs ? true
+, enableValgrind ? lib.meta.availableOn stdenv.hostPlatform valgrind-light
 
 , galliumDrivers ? [
     "d3d12" # WSL emulated GPU (aka Dozen)
@@ -214,6 +215,7 @@ in stdenv.mkDerivation {
     # meson auto_features enables this, but we do not want it
     (lib.mesonEnable "android-libbacktrace" false)
     (lib.mesonEnable "microsoft-clc" false) # Only relevant on Windows (OpenCL 1.2 API on top of D3D12)
+    (lib.mesonEnable "valgrind" enableValgrind)
   ] ++ lib.optionals enablePatentEncumberedCodecs [
     (lib.mesonOption "video-codecs" "all")
   ] ++ lib.optionals needNativeCLC [
@@ -247,13 +249,14 @@ in stdenv.mkDerivation {
     python3Packages.python # for shebang
     spirv-llvm-translator
     udev
-    valgrind-light
     vulkan-loader
     wayland
     wayland-protocols
     xcbutilkeysyms
     xorgproto
     zstd
+  ] ++ lib.optionals enableValgrind [
+    valgrind-light
   ];
 
   depsBuildBuild = [