[TSan][Clang][MIPS] Enabled thread option for MIPS64 platform
[TSan][Clang][MIPS] Enabled thread option for MIPS64 platform

Reviewers: kcc, samsonov, petarj, eugenis

Differential Revision: http://reviews.llvm.org/D6147

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@230209 91177308-0d34-0410-b5e6-96231b3b80d8

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