add lua binding (#53)

lua/ruapu-0.1-1.rockspec

@@ -0,0 +1,19 @@
+package = "ruapu"
+version = "0.1-1"
+source = {
+    url = "https://github.com/nihui/ruapu.git"
+}
+description = {
+    summary = "Detect CPU ISA features with single-file",
+    homepage = "https://github.com/nihui/ruapu",
+    license = "MIT"
+}
+dependencies = {
+    "lua >= 5.2, <= 5.4"
+}
+build = {
+    type = "builtin",
+    modules = {
+        ruapu = "ruapu-binding.c"
+    }
+}