autcross: add shorthand for dra2dpa

* bin/common_trans.cc: Add it.
* NEWS: Mention it.

NEWS

@@ -31,7 +31,8 @@ New in spot 2.7.5.dev (not yet released)
     acceptance condition among "Fin(0)", "t", or "f".
 
   - ltldo and ltlcross learned shorthands to call the tools ltl2na,
-    ltl2nba, and ltl2ngba from Owl 19.06.
+    ltl2nba, and ltl2ngba from Owl 19.06.  Similarly, autcross learned
+    a shorthand for Owl's dra2dpa.
 
   Documentation:
 

bin/common_trans.cc

@@ -70,6 +70,7 @@ static shorthands_t shorthands_ltl[] = {
 
 static shorthands_t shorthands_autproc[] = {
     { "autfilt", " %H>%O" },
+    { "dra2dpa", " <%H>%O" },
     { "dstar2tgba", " %H>%O" },
     { "ltl2dstar", " -B %H %O" },
     { "nba2dpa", " <%H>%O" },