Refactor ArgumentAdaptativeMatcher matchers to remove the template from their declaration.

Summary:
Refactor ArgumentAdaptativeMatcher matchers to remove the template from their declaration.
This facilitates dynamic registration. Change the registry code to use the regular overload resolution mechanism for adaptative matchers.

Reviewers: klimek

CC: cfe-commits, revane

Differential Revision: http://llvm-reviews.chandlerc.com/D1402

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188560 91177308-0d34-0410-b5e6-96231b3b80d8