Make memory for generated routines non-writable.

This change also fixes a missing include for memcmp().

Bug 14642677

Change-Id: I4207d259b9d7b20e0cb35ded65bacd5c2d882087
Reviewed-on: https://swiftshader-review.googlesource.com/3884
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

src/OpenGL/libEGL/Config.cpp

diff --git a/src/OpenGL/libEGL/Config.cpp b/src/OpenGL/libEGL/Config.cpp
index 835b198..d78d3db 100644
--- a/src/OpenGL/libEGL/Config.cpp
+++ b/src/OpenGL/libEGL/Config.cpp
@@ -27,6 +27,7 @@
 
 #include <string.h>
 #include <algorithm>
+#include <cstring>
 #include <vector>
 
 using namespace std;