egl: fix glvnd lib name in icd json file
Ubuntu is missing the libEGL_mesa.so -> libEGL_mesa.so.0
symlink, so let's just always point straight to libEGL_mesa.so.0
.
Closes: #2466 (closed)
Fixes: 0021f7dc ("egl: put full path to libEGL_mesa.so in GLVND json")