Fix pdp11 build

Needed this to test the effect of the SVE patches on other targets.

gcc/
	* config/pdp11/pdp11.c: Include dbxout.h.

From-SVN: r242474

gcc/ChangeLog

 2016-11-16  Richard Sandiford  <richard.sandiford@arm.com>
 
+	* config/pdp11/pdp11.c: Include dbxout.h.
+
+2016-11-16  Richard Sandiford  <richard.sandiford@arm.com>
+
 	* config/arc/arc.c (arc_loop_hazard): Add missing brackets.
 
 2016-11-16  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

gcc/config/pdp11/pdp11.c

@@ -39,6 +39,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "calls.h"
 #include "expr.h"
 #include "builtins.h"
+#include "dbxout.h"
 
 /* This file should be included last.  */
 #include "target-def.h"