*: merge some common strings

   text   data    bss    dec    hexfilename
 838650   8009      0 846659  ceb43busybox_old
 838519   8009      0 846528  ceac0busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/selinux/chcon.c b/selinux/chcon.c
index 4395a7e..c6be37f 100644
--- a/selinux/chcon.c
+++ b/selinux/chcon.c
@@ -90,13 +90,13 @@
 		if ((option_mask32 & OPT_VERBOSE) || ((option_mask32 & OPT_CHANHES) && !fail)) {
 			printf(!fail
 			       ? "context of %s changed to %s\n"
-			       : "failed to change context of %s to %s\n",
+			       : "can't change context of %s to %s\n",
 			       fname, context_string);
 		}
 		if (!fail) {
 			rc = TRUE;
 		} else if ((option_mask32 & OPT_QUIET) == 0) {
-			bb_error_msg("failed to change context of %s to %s",
+			bb_error_msg("can't change context of %s to %s",
 				     fname, context_string);
 		}
 	} else if (option_mask32 & OPT_VERBOSE) {
diff --git a/selinux/runcon.c b/selinux/runcon.c
index 8472b70..4afd111 100644
--- a/selinux/runcon.c
+++ b/selinux/runcon.c
@@ -59,13 +59,13 @@
 	if (!con)
 		bb_error_msg_and_die("'%s' is not a valid context", cur_context);
 	if (user && context_user_set(con, user))
-		bb_error_msg_and_die("failed to set new user '%s'", user);
+		bb_error_msg_and_die("can't set new user '%s'", user);
 	if (type && context_type_set(con, type))
-		bb_error_msg_and_die("failed to set new type '%s'", type);
+		bb_error_msg_and_die("can't set new type '%s'", type);
 	if (range && context_range_set(con, range))
-		bb_error_msg_and_die("failed to set new range '%s'", range);
+		bb_error_msg_and_die("can't set new range '%s'", range);
 	if (role && context_role_set(con, role))
-		bb_error_msg_and_die("failed to set new role '%s'", role);
+		bb_error_msg_and_die("can't set new role '%s'", role);
 
 	return con;
 }