[Test][Time profiler] Fix test for python3
[Test][Time profiler] Fix test for python3

Summary:
Fix test checking time profiler generates correct tracing json-file.
`filter` works differently for python2 and python3, so unifying this.

Reviewers: mgehre, nathanchance

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D66873

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@370300 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang