[PATCH] [lsan] [mips] adding support of lsan for mips64/mips64el arch

[Kumar Sukhani]

> Something must be wrong with your checkout. For me ninja check-sanitizer starts failing when I reverse the assertions in the test.

I am actually running make check-sanitizer. I am not sure what is the difference between them.
Today I first build clang/llvm from master, and then did testing using compiler-rt master branch.

Thanks for you comment, it will surely help me to fix TLS calculation.

http://reviews.llvm.org/D5616