add tinycrypt (#844)

* add tinycrypt

* Update xmake.lua

packages/t/tinycrypt/xmake.lua

@@ -0,0 +1,32 @@
+package("tinycrypt")
+    set_homepage("https://github.com/intel/tinycrypt")
+    set_description("TinyCrypt Cryptographic Library")
+
+    add_urls("https://github.com/intel/tinycrypt.git")
+    add_versions("2019.9.18", "5969b0e0f572a15ed95dc272e57104faeb5eb6b0")
+
+    on_install(function (package)
+        local configs = {}
+        io.writefile("xmake.lua", [[
+            add_rules("mode.release", "mode.debug")
+            target("tinycrypt")
+               set_kind("$(kind)")
+               add_files("lib/source/*.c")
+               add_includedirs("lib/include")
+               add_headerfiles("lib/include/(**.h)")
+               if is_plat("windows") and is_kind("shared") then
+                   add_rules("utils.symbols.export_all")
+               end
+        ]])
+        if package:config("shared") then
+            configs.kind = "shared"
+        end
+        if package:is_plat("windows", "mingw") then
+            io.replace("lib/include/tinycrypt/ecc_platform_specific.h", "#define default_RNG_defined 1", "#define default_RNG_defined 0", {plain = true})
+        end
+        import("package.tools.xmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:has_cfuncs("tc_aes_encrypt", {includes = "tinycrypt/aes.h"}))
+    end)