clang-format: Don't wrap "const" etc. of function declarations.

Generally people seem to prefer wrapping the first function parameter
over wrapping the trailing tokens "const", "override" and "final". This
does not extend to function-like annotations and probably not to other
non-standard annotations.

Before:
  void someLongFunction(int SomeLongParameter)
      const { ... }

After:
  void someLongFunction(
      int SomeLongParameter) const { ... }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201504 91177308-0d34-0410-b5e6-96231b3b80d8