add sparsepp (#1749)

* add sparsepp

* disable wasm

* disable wasm

packages/s/sparsepp/xmake.lua

@@ -0,0 +1,21 @@
+package("sparsepp")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/greg7mdp/sparsepp")
+    set_description("A fast, memory efficient hash map for C++")
+
+    add_urls("https://github.com/greg7mdp/sparsepp/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/greg7mdp/sparsepp.git")
+    add_versions("1.22", "5516c814fe56c692aaa36f49e696f4a6292f04b5ae79f4ab7bd121e2cc48b917")
+
+    on_install("linux", "macosx", "bsd", "windows", "android", "iphoneos", "cross", "mingw", function (package)
+        os.cp("sparsepp/*.h", package:installdir("include/sparsepp"))
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void test() {
+                spp::sparse_hash_set<int> test;
+                test.clear();
+            }
+        ]]}, {configs = {languages = "c++11"}, includes = {"sparsepp/spp.h"}}))
+    end)