Update NSPR to 4.12 and NSS to 3.23 on iOS

nss/lib/pk11wrap/pk11pub.h

Index: nss/lib/pk11wrap/pk11pub.h
diff --git a/nss/lib/pk11wrap/pk11pub.h b/nss/lib/pk11wrap/pk11pub.h
index d4565eb4e005fed0cca699d0bf57a866c64cd711..c130e1e143beffcc7dfc59ec2d3a7e5658ad77b7 100644
--- a/nss/lib/pk11wrap/pk11pub.h
+++ b/nss/lib/pk11wrap/pk11pub.h
@@ -709,12 +709,20 @@ int PK11_SignatureLen(SECKEYPrivateKey *key);
 PK11SlotInfo * PK11_GetSlotFromPrivateKey(SECKEYPrivateKey *key);
 SECStatus PK11_Sign(SECKEYPrivateKey *key, SECItem *sig,
 		    const SECItem *hash);
+SECStatus PK11_SignWithMechanism(SECKEYPrivateKey *key,
+                                 CK_MECHANISM_TYPE mechanism,
+                                 const SECItem *param, SECItem *sig,
+                                 const SECItem *hash);
 SECStatus PK11_SignWithSymKey(PK11SymKey *symKey, CK_MECHANISM_TYPE mechanism,
 		    SECItem *param, SECItem *sig, const SECItem *data);
 SECStatus PK11_VerifyRecover(SECKEYPublicKey *key, const SECItem *sig,
 			     SECItem *dsig, void * wincx);
 SECStatus PK11_Verify(SECKEYPublicKey *key, const SECItem *sig,
 		      const SECItem *hash, void *wincx);
+SECStatus PK11_VerifyWithMechanism(SECKEYPublicKey *key,
+                                   CK_MECHANISM_TYPE mechanism,
+                                   const SECItem *param, const SECItem *sig,
+                                   const SECItem *hash, void *wincx);