[clang-tidy] Add clang-tidy check for unique_ptr's reset+release -> move

Replace x.reset(y.release()); with x = std::move(y);
If y is rvalue, replace with x = y; instead.

http://reviews.llvm.org/D6485

Patch by Alexey Sokolov!


git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@223460 91177308-0d34-0410-b5e6-96231b3b80d8