Bug 1026858 - "search for "stdio.h" exactly". r=mshal
Bug 1025476 - Part 1: Add compulsory Init functions to AutoJSAPI. r=bholley
Bug 1024805 - Use TaggedAnonymousMemory for Nuwa thread stacks. r=khuey

Bonus fixes: make the guard page PROT_NONE instead of PROT_READ,
and correct the stack bounds passed to pthread_attr_setstack.