Fix atest statsd_test

Seems like we need to create a 64bit binary for atest

Test: atest statsd_test
Bug: 154509776
Change-Id: Ibc47183ed478a08c12fff43dcd9dc793a121d0a1
diff --git a/cmds/statsd/Android.bp b/cmds/statsd/Android.bp
index acd9ec3..f77ca38 100644
--- a/cmds/statsd/Android.bp
+++ b/cmds/statsd/Android.bp
@@ -295,7 +295,12 @@
 
     //TODO(b/153588990): Remove when the build system properly separates
     //32bit and 64bit architectures.
-    compile_multilib: "prefer32",
+    compile_multilib: "both",
+    multilib: {
+        lib64: {
+            suffix: "64",
+        }
+    },
 
     cflags: [
         "-Wall",