[scudo] Add missing <algorithm> include

After https://reviews.llvm.org/D119667, <algorithm> is no longer
transitively included from various headers. This patch adds the
<algorithm> include into scudo.

Differential Revision: https://reviews.llvm.org/D120171

Author: gulfemsavrun

compiler-rt/lib/scudo/standalone/tests/secondary_test.cpp

@@ -12,6 +12,7 @@
 #include "allocator_config.h"
 #include "secondary.h"
 
+#include <algorithm>
 #include <condition_variable>
 #include <memory>
 #include <mutex>