Make utils/UpdateTestChecks/common.py Python 2/3 compatible and fix print statements.

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D42674

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@324104 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed