package/libnss: bump version to 3.108
For release note, see:
https://hg.mozilla.org/projects/nss/file/1d23a5e8931c4b1929e76519eeb50e468927e677/doc/rst/releases/nss_3_108.rst
Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
[Julien: fix broken release note url]
Signed-off-by: Julien Olivain <ju.o@free.fr>