Move a couple more statistics inside '#ifndef NDEBUG'.

Suppresses an unused-variable warning in -Asserts builds.

llvm-svn: 181733
diff --git a/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp b/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
index d2d8325..bab49e7 100644
--- a/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
+++ b/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
@@ -303,11 +303,11 @@
                           "retain+autoreleaes eliminated");
 STATISTIC(NumRRs,         "Number of retain+release paths eliminated");
 STATISTIC(NumPeeps,       "Number of calls peephole-optimized");
+#ifndef NDEBUG
 STATISTIC(NumRetainsBeforeOpt,
           "Number of retains before optimization.");
 STATISTIC(NumReleasesBeforeOpt,
           "Number of releases before optimization.");
-#ifndef NDEBUG
 STATISTIC(NumRetainsAfterOpt,
           "Number of retains after optimization.");
 STATISTIC(NumReleasesAfterOpt,