gdi32, winex11.drv: Add support for subpixel font rendering.

[ByeongSik Jeon]

This patch doesn't add any patent infringing code into the Wine source tree.
But, we need to rebuild the FreeType2 library with 
#define FT_CONFIG_OPTION_SUBPIXEL_RENDERING .

Current libcairo, linxft use the different implementation.
But these implementation has the potentially patient infringing problem.

See the http://david.freetype.org/cleartype-patents.html .

---
 configure                  |    1 +
 configure.ac               |    1 +
 dlls/gdi32/freetype.c      |  150 +++++++++++++++++++++++++++++++++++++++++++-
 dlls/winex11.drv/xrender.c |   92 +++++++++++++++++++++++----
 include/config.h.in        |    3 +
 include/wingdi.h           |    7 ++-
 6 files changed, 236 insertions(+), 18 deletions(-)
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