Stop counting pops in tsan/check_analyze.sh.

Summary:
It looks like LLVM has started doing less tail duplication in this code,
or something like that, resulting in a significantly smaller number of
pop instructions (16 -> 12). Removing the check.

Reviewers: vitalybuka, dvyukov

Subscribers: kubamracek, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D63450

llvm-svn: 363615