Paul Eggert's approval is in
http://lists.gnu.org/archive/html/bug-gnulib/2016-11/msg00037.html.
Eric Blake's approval is in
http://lists.gnu.org/archive/html/bug-gnulib/2016-11/msg00042.html.
Ludovic Courtès's approval is in
http://lists.gnu.org/archive/html/bug-gnulib/2016-11/msg00038.html.
* modules/isnand-nolibm (License): Change to LGPLv2+.
* modules/isnanf-nolibm (License): Likewise.
* modules/isnanl-nolibm (License): Likewise.