Use NDK to build liblua

Bug: 135110855

Test: m liblua
Change-Id: I69afeb6f9a8c2afd62f4a0a4c8ed1d5e79cf0d86
diff --git a/Android.bp b/Android.bp
index b9a4edf..bec26e1 100644
--- a/Android.bp
+++ b/Android.bp
@@ -15,6 +15,7 @@
 
 cc_library_static {
     name: "liblua",
+    sdk_version: "current",
     cflags: [
         "-Werror",
         "-Wall",