Work-around for crt objects with sdk: current

Test: convert libcups from Android.mk->Android.bp, mm -j64.

Change-Id: I4fddcfa5806d0ce27a229c37a078b0d93e9082a8
diff --git a/cc/config/global.go b/cc/config/global.go
index 43ff975..a29afec 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -71,6 +71,8 @@
 	GccCppStdVersion          = "gnu++11"
 	ExperimentalCStdVersion   = "gnu11"
 	ExperimentalCppStdVersion = "gnu++1z"
+
+	NdkMaxPrebuiltVersionInt = 24
 )
 
 var pctx = android.NewPackageContext("android/soong/cc/config")