Updated SDL, Bullet and OpenAL soft libs

Fixed case sensitivity problem
Fixed clang compiler problem with having the class namespace used in an inline for the == operator
Tweaked some theme stuff to be more consistent.
Added initial test of no-pie for linux
test sidestep of getTexCoord in shadergen hlsl feature so we don't assert when getting the terrain's shaderstuffs(which uses float3 instead of normal float2)

Engine/source/T3D/systems/render/meshRenderSystem.h

@@ -1,6 +1,6 @@
 #pragma once
 #include "scene/sceneRenderState.h"
-#include "core/util/SystemInterfaceList.h"
+#include "core/util/systemInterfaceList.h"
 #include "ts/tsShape.h"
 #include "ts/tsShapeInstance.h"
 #include "T3D/assets/ShapeAsset.h"
@@ -59,4 +59,4 @@ public:
 
    //Render our particular interface's data
    static void renderInterface(U32 interfaceIndex, SceneRenderState* state);
-};
+};