ahaggar-ast: fix indent of integer_cst

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
ahaggar-ast: convert label_expr and label_decl to json

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
ahhaggar-ast: fix compenent ref

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>