[TSan][MIPS64] Fix few more test cases for MIPS64

Patch by Sagar Thakur

Reviewers: dvyukov, samsonov, kcc.

Subscribers:  dsanders, mohit.bhakkad, Anand.Takale, llvm-commits.

Differential Revision: http://reviews.llvm.org/D7290

llvm-svn: 230002