webkitgtk/epiphany: add opengl to REQUIRED_DISTRO_FEATURES
They can't be built without opengl in DISTRO_FEATURES.
[snip]
|webkitgtk-2.20.3/Source/WebCore/platform/graphics/OpenGLShims.h:23:10:
fatal error: GL/gl.h: No such file or directory
[snip]
Some sort of GL is needed yes. We indicate that with opengl loosely in OE
The epiphany depends on webkitgtk, add opengl to REQUIRED_DISTRO_FEATURES also.
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
