[oe] qt4-embedded-gles only build runtime libraries

[Doug Crawford]

If I include qt4-embedded-gles in my IMAGE_INSTALL then bitbake builds all of 
qt4: runtime libs, demos, and development tools.  How can I specify that I only 
want to build the qt runtime libs or just specific runtime libs and not build 
the demos, documentation, or dev tools?  I still want to use the 
qt4-embedded-gles recipe to include the opengl symbols in the gui libraries.

Thanks,
Doug