* sem_ch3.adb (Analyze_Variant_Part): check that type of discriminant
is discrete before analyzing choices.
* bindgen.adb (Gen_Output_File_Ada): Generate a new C-like string
containing the name of the Ada Main Program. This string is mainly
intended for the debugger.
(Gen_Output_File_C): Do the equivalent change when generating a C file.
* ali.adb: Set new Dummy_Entry field in dependency entry
* ali.ads: Add Dummy_Entry field to source dependency table
* bcheck.adb (Check_Consistency): Ignore dummy D lines
* lib-writ.adb (Writ_ALI): Write dummy D lines for missing source files
* lib-writ.ads: Document dummy D lines for missing files.
* types.ads: (Dummy_Time_Stamp): New value for non-existant files
From-SVN: r48126
