Log Message:
Update to 4.10.2

Changelog:
NSPR 4.10.2 has the following bug fixes:
* Bug 770534: Possible pointer overflow in PL_ArenaAllocate().
  Fixed by Pascal Cuoq and Kamil Dudka.
* Bug 888546: ptio.c:PR_ImportUDPSocket doesn't work. Fixed by
  Miloslav Trmac
* Bug 915522: VS2013 support for NSPR. Fixed by Makoto Kato.
* Bug 927687: (CVE-2013-5607) Avoid unsigned integer wrapping in
  PL_ArenaAllocate.