Disable STL for crt objects

cc_objects are getting support for STL headers, disable them for
crt objects to avoid a circular dependency through libc++.

Test: m checkbuild
Change-Id: I4e0f4a2193ce98ec4b8802492add9014ec0dba98
diff --git a/libc/Android.bp b/libc/Android.bp
index 57173d1..ed8548a 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -1858,6 +1858,7 @@
             cflags: ["-fPIC"],
         },
     },
+    stl: "none",
 }
 
 // crt obj files