Update NSS to 3.21 RTM and NSPR to 4.11 RTM

nss/lib/libpkix/pkix/top/pkix_build.c

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /*
  * pkix_build.c
  *
  * Top level buildChain function
  *
  */
 
@@ skipping 1508 matching lines @@
 }
 
 /* Match trust anchor to select params in order to find next cert. */
 static PKIX_Error*
 pkix_Build_SelectCertsFromTrustAnchors(
     PKIX_List *trustAnchorsList,
     PKIX_ComCertSelParams *certSelParams,
     PKIX_List **pMatchList,
     void *plContext) 
 {
-    int anchorIndex = 0;
+    unsigned int anchorIndex = 0;
     PKIX_TrustAnchor *anchor = NULL;
     PKIX_PL_Cert *trustedCert = NULL;
     PKIX_List *matchList = NULL;
     PKIX_CertSelector *certSel = NULL;
     PKIX_CertSelector_MatchCallback selectorMatchCB = NULL;
 
     PKIX_ENTER(BUILD, "pkix_Build_SelectCertsFromTrustAnchors");
     
     PKIX_CHECK(PKIX_CertSelector_Create
                (NULL, NULL, &certSel, plContext),
@@ skipping 2202 matching lines @@
                 *pBuildResult = buildResult;
                 buildResult = NULL;
         }
 
 cleanup:
         PKIX_DECREF(buildResult);
         PKIX_DECREF(state);
 
         PKIX_RETURN(BUILD);
 }