FreeType bitmaps interpreted in wrong format

FreeType bitmaps interpreted in wrong format

We ask grayscale or mono bitmaps from FreeType but in some cases treat
the output as ARGB without conversion. This surfaces using QGLWidget as
a viewport to QDeclarative content. The offending glyphs are then
generated through QTextureGlyphCache::textureMapForGlyph. This adds a
fix for converting to the expected ARGB32 data.

Change-Id: Ia219582ebd76b7e4e9379111a42312b4d97718de
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>