sim: constify sim_fpu_print_status

I've committed the following patch as obvious.  The local "prefix"
variable is only assigned const strings, and only passed to printf()
functions, so add "const" to avoid gcc warnings:
common/sim-fpu.c: In function 'sim_fpu_print_status':
common/sim-fpu.c:2508: warning: initialization discards qualifiers
	from pointer target type
common/sim-fpu.c:2566: warning: assignment discards qualifiers
	from pointer target type

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

sim/common/ChangeLog

@@ -1,3 +1,8 @@
+2010-04-10  Mike Frysinger  <vapier@gentoo.org>
+
+	* sim-fpu.c (sim_fpu_print_status): Add const markings to local
+	"prefix" var.
+
 2010-04-10  Mike Frysinger  <vapier@gentoo.org>
 
 	* sim-fpu.c (sim_fpu_print_status): Remove duplicate break statements.

sim/common/sim-fpu.c

@@ -2497,7 +2497,7 @@ sim_fpu_print_status (int status,
 		      void *arg)
 {
   int i = 1;
-  char *prefix = "";
+  const char *prefix = "";
   while (status >= i)
     {
       switch ((sim_fpu_status) (status & i))