Text: fix the non-GL build.

src/Magnum/Text/Renderer.cpp

@@ -26,11 +26,14 @@
 #include "Renderer.h"
 
 #include <Corrade/Containers/StridedArrayView.h>
+#include <Corrade/Containers/Optional.h>
 #include <Corrade/Containers/Triple.h>
 
 #include "Magnum/Math/Functions.h"
+#include "Magnum/Math/Range.h"
 #include "Magnum/Text/AbstractFont.h"
 #include "Magnum/Text/AbstractGlyphCache.h"
+#include "Magnum/Text/Alignment.h"
 #include "Magnum/Text/Direction.h"
 
 #ifdef MAGNUM_TARGET_GL

src/Magnum/Text/Renderer.h

@@ -29,6 +29,7 @@
  * @brief Class @ref Magnum::Text::AbstractRenderer, @ref Magnum::Text::Renderer, typedef @ref Magnum::Text::Renderer2D, @ref Magnum::Text::Renderer3D, function @ref Magnum::Text::renderLineGlyphPositionsInto(), @ref Magnum::Text::renderGlyphQuadsInto() @ref Magnum::Text::alignRenderedLine(), @ref Magnum::Text::alignRenderedBlock()
  */
 
+#include "Magnum/Magnum.h"
 #include "Magnum/Text/Text.h"
 #include "Magnum/Text/visibility.h"