bvh: add package (#2259)

* bvh: add package

* bvh: fix cross

packages/b/bvh/xmake.lua

@@ -0,0 +1,25 @@
+package("bvh")
+
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/madmann91/bvh")
+    set_description("A modern C++ BVH construction and traversal library")
+    set_license("MIT")
+
+    add_urls("https://github.com/madmann91/bvh.git")
+    add_versions("2023.6.30", "578b1e8035743d0a97fcac802de81622c54f28e3")
+
+    on_install(function (package)
+        if not package:is_plat("cross") then
+            package:add("cxxflags", "-march=native")
+        end
+        os.cp("src/bvh", package:installdir("include"))
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <bvh/v2/thread_pool.h>
+            void test() {
+                bvh::v2::ThreadPool thread_pool;
+            }
+        ]]}, {configs = {languages = "c++20"}}))
+    end)