Add include for 'test_macros.h' to all the tests that were missing them. Thanks to Zoe for the (big, but simple) patch. NFC intended.

llvm-svn: 362252
diff --git a/libcxx/test/std/numerics/numeric.ops/reduce/reduce.pass.cpp b/libcxx/test/std/numerics/numeric.ops/reduce/reduce.pass.cpp
index 031a12d..56d6c8e 100644
--- a/libcxx/test/std/numerics/numeric.ops/reduce/reduce.pass.cpp
+++ b/libcxx/test/std/numerics/numeric.ops/reduce/reduce.pass.cpp
@@ -16,6 +16,7 @@
 #include <numeric>
 #include <cassert>
 
+#include "test_macros.h"
 #include "test_iterators.h"
 
 template <class Iter, class T>