[Ada] Minor cleanup in repinfo unit

This factors out the various cases where a marker for an unknown value is output by the -gnatR switches. No functional changes. Tested on x86_64-pc-linux-gnu, committed on trunk 2018-05-29 Eric Botcazou gcc/ada/ * repinfo.adb (Write_Unknown_Val): New procedure. (List_GCC_Exp

[Ada] Minor cleanup in repinfo unit

This removes the Truth_Andif_Expr and Truth_Orif_Expr codes for expressions handled by the repinfo unit, since they are redundant with Truth_And_Expr and Truth_Or_Expr respectively in this context. No functional changes. Tested on x86_64-pc-linux-gnu, committed on trunk 2018-05-28 Eric Botcazou