NSS: update to 3.12.6 RC0

scripts/nss-checkout.sh

 #!/bin/sh
 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This shell script checks out the NSS source tree from CVS and prepares
 # it for Chromium.
 
 # Make the script exit as soon as something fails.
 set -ex
 
 rm -rf mozilla/security/nss/lib
 cvs -q -d :pserver:anonymous@cvs-mirror.mozilla.org:/cvsroot export \
-    -r NSS_3_12_6_BETA1 mozilla/security/nss/lib
+    -r NSS_3_12_6_RC0 mozilla/security/nss/lib
 
 # Rename one of the utf8.c files to avoid name conflict.
 mv mozilla/security/nss/lib/base/utf8.c mozilla/security/nss/lib/base/nssutf8.c
 
 rm -r mozilla/security/nss/lib/ckfw
 rm -r mozilla/security/nss/lib/crmf
 rm -r mozilla/security/nss/lib/freebl/ecl/tests
 rm -r mozilla/security/nss/lib/freebl/mpi/doc
 rm -r mozilla/security/nss/lib/freebl/mpi/tests
 rm -r mozilla/security/nss/lib/freebl/mpi/utils
@@ skipping 53 matching lines @@
     ! -name mp_gf2m-priv.h ! -name mp_gf2m.c ! -name mp_gf2m.h \
     ! -name primes.c ! -name pqg.c ! -name rawhash.c \
     ! -name rijndael.c ! -name rijndael.h ! -name rijndael32.tab \
     ! -name rsa.c ! -name sechash.h ! -name secmpi.h \
     ! -name secrng.h ! -name seed.c ! -name seed.h \
     ! -name sha256.h ! -name sha512.c ! -name sha_fast.c \
     ! -name sha_fast.h ! -name shsign.h ! -name shvfy.c \
     ! -name sysrand.c ! -name tlsprfalg.c ! -name unix_rand.c \
     ! -name win_rand.c \
     | xargs rm