6970584: Flow.java should be more error-friendly
Summary: Added a post-attribution visitor that fixup uninitialized types/symbol in AST after erroneous attribution
Reviewed-by: jjg
^build/
^dist/
/nbproject/private/
^src/share/tools/hsdis/build/
^src/share/tools/IdealGraphVisualizer/[a-zA-Z0-9]*/build/
^src/share/tools/IdealGraphVisualizer/build/
^src/share/tools/IdealGraphVisualizer/dist/