Roll NSS from r244613 to r245298.

This pulls in 1 change:

r245298: Add SEC_SignData to NSS exports. (eroman@chromium.org) 

BUG=245025

Review URL: https://codereview.chromium.org/140763005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245394 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245395 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245395