Sema: attribute((annotate)) must have at least one argument

Sema::handleAnnotateAttr expects that some basic validation is done on
the given AttributeList.  However, ProcessAccessDeclAttributeList called
it directly.  Instead, pass the list to ProcessDeclAttribute.

This fixes PR21847.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224204 91177308-0d34-0410-b5e6-96231b3b80d8
If a non-template constructor instantiated to X(X),
ignore it during overload resolution when initializing
X from a value of type cv X.

Previously, our rule here only ignored specializations
of constructor templates.  That's probably because the
standard says that constructors are outright ill-formed
if their first parameter is literally X and they're
callable with one argument.  However, Clang only
enforces that prohibition against non-implicit
instantiations; I'm not sure why, but it seems to be
deliberate.  Given that, the most sensible thing to
do is to just ignore the "illegal" constructor
regardless of where it came from.

Also, stop ignoring such constructors silently:
print a note explaining why they're being ignored.

Fixes <rdar://19199836>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224205 91177308-0d34-0410-b5e6-96231b3b80d8