Update NSPR to 4.12 and NSS to 3.23 on iOS

nss/lib/freebl/poly1305.c

Index: nss/lib/freebl/poly1305.c
diff --git a/nss/lib/freebl/poly1305/poly1305.c b/nss/lib/freebl/poly1305.c
similarity index 98%
rename from nss/lib/freebl/poly1305/poly1305.c
rename to nss/lib/freebl/poly1305.c
index d86048a4efe7f7408192068763806d685aa3ae22..da0ab6d78747b3250bb114ef79977f52c60c5fd2 100644
--- a/nss/lib/freebl/poly1305/poly1305.c
+++ b/nss/lib/freebl/poly1305.c
@@ -7,10 +7,17 @@
  * domain. */
 
 #include <string.h>
-#include <stdint.h>
 
 #include "poly1305.h"
 
+#if defined(_MSC_VER) && _MSC_VER < 1600
+#include "prtypes.h"
+typedef PRUint32 uint32_t;
+typedef PRUint64 uint64_t;
+#else
+#include <stdint.h>
+#endif
+
 #if defined(NSS_X86) || defined(NSS_X64)
 /* We can assume little-endian. */
 static uint32_t U8TO32_LE(const unsigned char *m) {