check mebdtls and openssl

packages/m/mbedtls/xmake.lua

@@ -26,3 +26,7 @@ package("mbedtls")
         os.vrun("make install")
     end)
 
+    on_test(function (package)
+        assert(package:has_cfuncs("mbedtls_ssl_init", {includes = "mbedtls/ssl.h"}))
+    end)
+

packages/o/openssl/xmake.lua

@@ -20,3 +20,6 @@ package("openssl")
         os.vrun("make install")
     end)
 
+    on_test(function (package)
+        assert(package:has_cfuncs("SSL_new", {includes = "openssl/ssl.h"}))
+    end)