Update src/third_party/nss to r48440, which contains two changes: 1. Mac OS X, 32-bit port. 2. Update to NSS_3_12_6_RTM.
Update src/third_party/nss to r48440, which contains two changes:
1. Mac OS X, 32-bit port.
2. Update to NSS_3_12_6_RTM.

R=mark
BUG=30689
TEST=No build errors on Mac and Windows.
Review URL: http://codereview.chromium.org/2330001

git-svn-id: http://src.chromium.org/svn/trunk/src@48497 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 2960d13901d3fc992d3296f86ec3372deae27dd9
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser