[NFC] Use stdin for some tests instead of positional argument.

Summary: Otherwise unexpected matches with the path to the tests might happen.

Reviewers: rengolin, spatel, efriedma, RKSimon

Reviewed By: spatel

Subscribers: n.bozhenov, javed.absar, llvm-commits

Patch by Andrei Elovikov <andrei.elovikov@intel.com>

Differential Revision: https://reviews.llvm.org/D32994


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306684 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed