[clang-tidy] Add check to detect dangling references in value handlers.

[clang-tidy] Add check to detect dangling references in value handlers.

Summary:
Add check misc-dangling-handle to detect dangling references in value
handlers like std::experimental::string_view.
It provides a configuration option to specify other handle types that
should also be checked.

Right now it detects:
 - Construction from temporaries.
 - Assignment from temporaries.
 - Return statements from temporaries or locals.
 - Insertion into containers from temporaries.

Reviewers: alexfh

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D17811

llvm-svn: 264759