haiku3d: Fix haiku3d build

* Add GL header include path
* Remove strange GL include path from sources

src/apps/haiku3d/Jamfile

@@ -1,8 +1,14 @@
 SubDir HAIKU_TOP src apps haiku3d ;
+SubDirSysHdrs $(HAIKU_MESA_HEADERS) ;
 
 SEARCH_SOURCE += [ FDirName $(SUBDIR) mesh ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) texture ] ;
 
+# For GCC2
+if $(HAIKU_GCC_VERSION[1]) < 3 {
+	SubDirC++Flags --no-warnings ;
+}
+
 UsePrivateHeaders shared ;
 
 Application Haiku3d :

src/apps/haiku3d/MeshInstance.cpp

@@ -8,7 +8,7 @@
 
 #include "MeshInstance.h"
 #include "MathUtils.h"
-#include <opengl/GL/gl.h>
+#include <GL/gl.h>
 
 //#include <stdio.h> // debug
 

src/apps/haiku3d/RenderView.cpp

@@ -14,8 +14,8 @@
 #include "StaticMesh.h"
 #include "VideoFileTexture.h"
 
-#include <opengl/GL/gl.h>
-#include <opengl/GL/glu.h>
+#include <GL/gl.h>
+#include <GL/glu.h>
 
 #include <TranslationKit.h>
 #include <TranslationUtils.h>

src/apps/haiku3d/Texture.cpp

@@ -8,7 +8,7 @@
 
 #include "Texture.h"
 
-#include <opengl/GL/gl.h>
+#include <GL/gl.h>
 
 
 Texture::Texture()

src/apps/haiku3d/Texture.h

@@ -10,7 +10,7 @@
 
 #include <Referenceable.h>
 
-#include <opengl/GL/gl.h>
+#include <GL/gl.h>
 
 
 class Texture : public BReferenceable {

src/apps/haiku3d/texture/BitmapTexture.cpp

@@ -10,8 +10,8 @@
 
 #include <Bitmap.h>
 
-#include <opengl/GL/gl.h>
-#include <opengl/GL/glu.h>
+#include <GL/gl.h>
+#include <GL/glu.h>
 #include <stdio.h>
 
 

src/apps/haiku3d/texture/VideoFileTexture.cpp

@@ -13,8 +13,8 @@
 #include <MediaFile.h>
 #include <MediaTrack.h>
 
-#include <opengl/GL/gl.h>
-#include <opengl/GL/glu.h>
+#include <GL/gl.h>
+#include <GL/glu.h>
 #include <string.h>
 #include <stdio.h>