Update NSPR to 4.12 and NSS to 3.23 on iOS

nspr/lib/ds/plarena.h

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* 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/. */
 
 #ifndef plarena_h___
 #define plarena_h___
 /*
  * Lifetime-based fast allocation, inspired by much prior art, including
  * "Fast Allocation and Deallocation of Memory Based on Object Lifetimes"
@@ skipping 78 matching lines @@
 #define PL_SANITIZE_ADDRESS 1
 #endif
 #elif defined(__SANITIZE_ADDRESS__)
 #define PL_SANITIZE_ADDRESS 1
 #endif
 
 #if defined(PL_SANITIZE_ADDRESS)
 
 /* These definitions are usually provided through the
  * sanitizer/asan_interface.h header installed by ASan.
- * See https://code.google.com/p/address-sanitizer/wiki/ManualPoisoning
+ * See https://github.com/google/sanitizers/wiki/AddressSanitizerManualPoisoning
  */
 
-void __asan_poison_memory_region(void const volatile *addr, size_t size);
-void __asan_unpoison_memory_region(void const volatile *addr, size_t size);
+PR_IMPORT(void) __asan_poison_memory_region(void const volatile *addr, size_t size);
+PR_IMPORT(void) __asan_unpoison_memory_region(void const volatile *addr, size_t size);
 
 #define PL_MAKE_MEM_NOACCESS(addr, size) \
     __asan_poison_memory_region((addr), (size))
 
 #define PL_MAKE_MEM_UNDEFINED(addr, size) \
     __asan_unpoison_memory_region((addr), (size))
 
 #define PL_MAKE_MEM_DEFINED(addr, size) \
     __asan_unpoison_memory_region((addr), (size))
 
@@ skipping 135 matching lines @@
 #define PL_ArenaCountInplaceGrowth(ap, size, incr)      /* nothing */
 #define PL_ArenaCountGrowth(ap, size, incr)             /* nothing */
 #define PL_ArenaCountRelease(ap, mark)                  /* nothing */
 #define PL_ArenaCountRetract(ap, mark)                  /* nothing */
 
 #endif /* !PL_ARENAMETER */
 
 PR_END_EXTERN_C
 
 #endif /* plarena_h___ */