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/experimental/simd/simd.cons/broadcast.pass.cpp b/libcxx/test/std/experimental/simd/simd.cons/broadcast.pass.cpp
index 25dd8a4..cf038e3 100644
--- a/libcxx/test/std/experimental/simd/simd.cons/broadcast.pass.cpp
+++ b/libcxx/test/std/experimental/simd/simd.cons/broadcast.pass.cpp
@@ -19,6 +19,8 @@
 #include <cstdint>
 #include <experimental/simd>
 
+#include "test_macros.h"
+
 namespace ex = std::experimental::parallelism_v2;
 
 template <class T, class... Args>