fa4a80 build.sh:buildp_ast(): correctly call rtl_kill_tree().

Authored and Committed by Lucio Andrés Illanes Albornoz 4 years ago
    build.sh:buildp_ast(): correctly call rtl_kill_tree().
    subr/rtl_complex.subr:rtl_kill_tree(): iteratively & recursively kill tree of processes excluding ${$}.
    
        
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