tinyalloc: add package (#3015)

* tinyalloc: add package

* remove defines

packages/t/tinyalloc/xmake.lua

@@ -0,0 +1,25 @@
+package("tinyalloc")
+    set_homepage("https://github.com/thi-ng/tinyalloc")
+    set_description("malloc / free replacement for unmanaged, linear memory situations (e.g. WASM, embedded devices...)")
+    set_license("Apache-2.0")
+
+    add_urls("https://github.com/thi-ng/tinyalloc.git")
+    add_versions("2021.10.08", "b60fcd7a351dea8a51f3ec95b19fc0d0d2e4dcd9")
+
+    on_install(function (package)
+        io.writefile("xmake.lua", [[
+            add_rules("mode.release", "mode.debug")
+            target("tinyalloc")
+                set_kind("$(kind)")
+                add_files("tinyalloc.c")
+                add_headerfiles("tinyalloc.h")
+                if is_plat("windows") and is_kind("shared") then
+                    add_rules("utils.symbols.export_all")
+                end
+        ]])
+        import("package.tools.xmake").install(package)
+    end)
+
+    on_test(function (package)
+        assert(package:has_cfuncs("ta_init", {includes = "tinyalloc.h"}))
+    end)