adding tinycthread package for windows, linux and macos (#6461)

* adding tinycthread package for windows, linux and macos

* fixing bad target name

* Update xmake.lua

* fixing test

* fixing test

* Update xmake.lua

* Update xmake.lua

---------

Co-authored-by: Jérôme Leclercq <[email protected]>

packages/t/tinycthread/xmake.lua

@@ -0,0 +1,42 @@
+package("tinycthread")
+	set_homepage("https://github.com/tinycthread/tinycthread")
+    set_description("A small, portable implementation of the C11 threads API.")
+    set_license("MIT")
+
+    add_urls("https://github.com/tinycthread/tinycthread.git")
+
+    add_versions("2016.09.30", "6957fc8383d6c7db25b60b8c849b29caab1caaee")
+
+    if is_plat("linux", "bsd", "cross") then
+        add_syslinks("pthread")
+    end
+
+	on_install(function (package)
+        io.writefile("xmake.lua", [[
+            add_rules("mode.debug", "mode.release")
+            target("tinycthread")
+                set_kind("$(kind)")
+                add_files("source/*.c")
+                add_headerfiles("source/*.h")
+
+                if is_kind("shared") then
+                    add_rules("utils.symbols.export_all")
+                end
+        ]])
+        import("package.tools.xmake").install(package)
+    end)
+
+    on_test(function (package)
+        assert(package:check_csnippets({test = [[
+            int thread_entrypoint(void* arg) {
+                (void) arg;
+                return 0;
+            }
+            void test() {
+                thrd_t t;
+                if (thrd_create(&t, thread_entrypoint, (void*)0) == thrd_success) {
+                    thrd_join(t, NULL);
+                }
+            }
+        ]]}, {includes = {"tinycthread.h"}}))
+    end)