Replace <memory.h> with <cstring>.

<memory.h> isn't actually an official standard C header.
memcpy() is defined in <string.h> / <cstring>.

Change-Id: I578e3a8ea741934e594049e359b906665de80134
Reviewed-on: https://swiftshader-review.googlesource.com/c/22649
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
diff --git a/src/Pipeline/Constants.cpp b/src/Pipeline/Constants.cpp
index 25f08e2..a7f5a6b 100644
--- a/src/Pipeline/Constants.cpp
+++ b/src/Pipeline/Constants.cpp
@@ -17,7 +17,7 @@
 #include "System/Math.hpp"
 #include "System/Half.hpp"
 
-#include <memory.h>
+#include <cstring>
 
 namespace sw
 {