Update NSS to 3.21 RTM and NSPR to 4.11 RTM

nss/lib/pki/certificate.c

Index: nss/lib/pki/certificate.c
diff --git a/nss/lib/pki/certificate.c b/nss/lib/pki/certificate.c
index ed6145a5596870e37999a38430804a27cfdfdac9..fdf147c9e3dd1bd4cb778d85cd0fb9a3467e11d8 100644
--- a/nss/lib/pki/certificate.c
+++ b/nss/lib/pki/certificate.c
@@ -895,7 +895,6 @@ nssCertificateList_DoCallback (
 {
     nssListIterator *certs;
     NSSCertificate *cert;
-    PRStatus nssrv;
     certs = nssList_CreateIterator(certList);
     if (!certs) {
         return PR_FAILURE;
@@ -904,7 +903,7 @@ nssCertificateList_DoCallback (
          cert != (NSSCertificate *)NULL;
          cert  = (NSSCertificate *)nssListIterator_Next(certs))
     {
-	nssrv = (*callback)(cert, arg);
+	(void)(*callback)(cert, arg);
     }
     nssListIterator_Finish(certs);
     nssListIterator_Destroy(certs);