libEGL: allow devices to workaround Google bug 10194508

Most older blobs don't have the EGL_KHR_gl_colorspace
extension and need this workaround.

Change-Id: Ifc5d097c1a0b68275d23c2d191976ac96631b695
Merge pull request #1 from SlimRoms/kk4.4

libEGL: allow devices to workaround Google bug 10194508