Test cases fixed :
- global_race.cc, global_race2.cc, global_race3.cc : File Check expects a 47-bit address in place of ADDR, ADDR2, ADDR3 in the test cases. Used 40-bit address for mips64.
- map32bit.cc : MAP_32BIT flag for mmap is supported only for x86_64. Marked as XFAIL for mips64.
- mmap_large.cc : Mmap start address is given according to 47-bit address space. Used 40-bit address for mips64.
- signal_errno.cc : Stack trace was incorrect because pc was incremented by 1 in tsan_interceptors.cc:1908 in CallUserSignalHandler (). Used StackTrace::GetNextInstructionPC () in place of pc +1.