rev 1.54 of i386/include/pcb.h depended on sys/proc.h. The prerequisite

was satisified for the rest of the kernel on the i386 build except for
these two files.  Rather than adding a submarine include to pcb.h, I've
added proc.h here.

I forgot to include these with the original commit. Sorry folks.

sys/ddb/db_print.c

@@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
 
 #include <sys/param.h>
 #include <sys/kdb.h>
+#include <sys/proc.h>
 
 #include <machine/pcb.h>
 

sys/ddb/db_run.c

@@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
 
 #include <sys/param.h>
 #include <sys/kdb.h>
+#include <sys/proc.h>
 
 #include <machine/kdb.h>
 #include <machine/pcb.h>