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- an extra "end if" was generated in some cases when using continuous
  signals
- when generating the simulation script, lower the process name as gnat
  generates only lowercase .o files

Range checks for operator DIV and MINUS were incorrect
as reported by Alexandre Esteves

Don't do anything at elaboration

the Makefile.Python would not regenerate dataview-uniq.h if the file is
already there, but for the python backends we must not have the asn1scc
prefixes