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/db_cfront.pass.cpp b/libcxx/test/strings/basic.string/string.access/db_cfront.pass.cpp
index d36885e..9f7785b 100644
--- a/libcxx/test/strings/basic.string/string.access/db_cfront.pass.cpp
+++ b/libcxx/test/strings/basic.string/string.access/db_cfront.pass.cpp
@@ -21,7 +21,7 @@
 #include <exception>
 #include <cstdlib>
 
-#include "../min_allocator.h"
+#include "min_allocator.h"
 
 int main()
 {