The libglvnd-core-devel package is a bootstrap trick for Mesa, which wants to build against the libglvnd headers but does not link against any of its libraries (and, initially, has file conflicts with them). If you are not Mesa you almost certainly want libglvnd-devel instead.
acquired package info from repodata DB: repodata/f1f85c23079e7764ad00378a9fc5d660b89a03657290e75426caf7be5b7da462-primary.sqlite.bz2