/usr/include/CEGUI/RendererModules/ is in libcegui-mk2-dev 0.7.5-8.
This file is owned by root:root, with mode 0o755.
..
/usr/include/CEGUI/RendererModules/Null/
/usr/include/CEGUI/RendererModules/Null/CEGUINullGeometryBuffer.h
/usr/include/CEGUI/RendererModules/Null/CEGUINullRenderTarget.h
/usr/include/CEGUI/RendererModules/Null/CEGUINullRenderer.h
/usr/include/CEGUI/RendererModules/Null/CEGUINullTexture.h
/usr/include/CEGUI/RendererModules/Null/CEGUINullTextureTarget.h
/usr/include/CEGUI/RendererModules/Ogre/
/usr/include/CEGUI/RendererModules/Ogre/CEGUIOgreGeometryBuffer.h
/usr/include/CEGUI/RendererModules/Ogre/CEGUIOgreImageCodec.h
/usr/include/CEGUI/RendererModules/Ogre/CEGUIOgreRenderTarget.h
/usr/include/CEGUI/RendererModules/Ogre/CEGUIOgreRenderer.h
/usr/include/CEGUI/RendererModules/Ogre/CEGUIOgreResourceProvider.h
/usr/include/CEGUI/RendererModules/Ogre/CEGUIOgreTexture.h
/usr/include/CEGUI/RendererModules/Ogre/CEGUIOgreTextureTarget.h
/usr/include/CEGUI/RendererModules/Ogre/CEGUIOgreWindowTarget.h
/usr/include/CEGUI/RendererModules/OpenGL/
/usr/include/CEGUI/RendererModules/OpenGL/CEGUIOpenGL.h
/usr/include/CEGUI/RendererModules/OpenGL/CEGUIOpenGLFBOTextureTarget.h
/usr/include/CEGUI/RendererModules/OpenGL/CEGUIOpenGLGLXPBTextureTarget.h
/usr/include/CEGUI/RendererModules/OpenGL/CEGUIOpenGLGeometryBuffer.h
/usr/include/CEGUI/RendererModules/OpenGL/CEGUIOpenGLRenderTarget.h
/usr/include/CEGUI/RendererModules/OpenGL/CEGUIOpenGLRenderer.h
/usr/include/CEGUI/RendererModules/OpenGL/CEGUIOpenGLTexture.h
/usr/include/CEGUI/RendererModules/OpenGL/CEGUIOpenGLTextureTarget.h
/usr/include/CEGUI/RendererModules/OpenGL/CEGUIOpenGLViewportTarget.h