There were two identical files named 'min_allocator.h'. Move one of them to /support and delete the other. Then adjust all the tests that used them to include the moved one. No functionality change.

llvm-svn: 195785
diff --git a/libcxx/test/strings/basic.string/string.access/back.pass.cpp b/libcxx/test/strings/basic.string/string.access/back.pass.cpp
index ed0d327..e915214 100644
--- a/libcxx/test/strings/basic.string/string.access/back.pass.cpp
+++ b/libcxx/test/strings/basic.string/string.access/back.pass.cpp
@@ -19,7 +19,7 @@
 #include <string>
 #include <cassert>
 
-#include "../min_allocator.h"
+#include "min_allocator.h"
 
 template <class S>
 void