fix(gx): add missing include <cstring>

src/gx/glsdl/GLBuffer.cpp

@@ -4,6 +4,7 @@
 #include "gx/glsdl/GL.hpp"
 #include <bc/Debug.hpp>
 #include <bc/Memory.hpp>
+#include <cstring>
 
 bool GLBuffer::m_UsingVBO = 1;
 

src/gx/glsdl/GLShader.cpp

@@ -5,6 +5,7 @@
 #include "gx/glsdl/GLVertexShader.hpp"
 #include "gx/glsdl/GL.hpp"
 #include <bc/Debug.hpp>
+#include <cstring>
 
 // TODO
 // - threaded compiler support