[PATCH]ast-dump: add -ast-dump-no-include option

[Li Jinpei via cfe-commits]

Add an option, -ast-dump-no-include, to clang and clang-check. Usage 
example:

clang++ -Xclang -ast-dump -Xclang -ast-dump-no-include -fsyntax-only 
test.cpp

clang-check -ast-print -ast-dump-no-include test.cpp

This option work with  -ast-dump, -ast-dump-lookups or -ast-print to not 
show decls from included headers. This can be useful if you don't want 
decls from headers mess up ast-dump outputs.

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