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Parsing standard library headers in Visual Studio 11 and above requires
Clang to use -std=c++11 because the headers use C++11 constructs. While
gccxml output format does not support these constructs, it is still
useful to be able to output interfaces from C++98 project code while
tolerating C++11 constructs in system headers.
Drop the rejection of -std=c++11 and --castxml-gccxml together. Teach
our ASTVisitor::AddDumpNode method to skip deleted member functions,
implicit move constructors, and implicit move assignment operators.
This should avoid encountering any C++11 constructs that are not written
explicitly in the translation unit.
Extend the test suite to run all gccxml output format tests in both
-std=c++98 and -std=c++11 mode to verify the behavior of the two modes
is as close as possible. Tweak the Class-implicit-members expected
output to tolerate the empty throw specification missing in C++11 mode.
Add a RValueReferenceType test to verify that the gccxml-format output
contains an Unimplemented element for the rvalue-reference type.
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