*: 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/util-linux/mdev.c b/util-linux/mdev.c
index 3cee3a6..b0efd98 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -340,7 +340,7 @@
 
 			if (!delete && major >= 0) {
 				if (mknod(node_name, mode | type, makedev(major, minor)) && errno != EEXIST)
-					bb_perror_msg("can't create %s", node_name);
+					bb_perror_msg("can't create '%s'", node_name);
 				if (major == G.root_major && minor == G.root_minor)
 					symlink(node_name, "root");
 				if (ENABLE_FEATURE_MDEV_CONF) {
diff --git a/util-linux/mkfs_minix.c b/util-linux/mkfs_minix.c
index c6c2036..abfb942 100644
--- a/util-linux/mkfs_minix.c
+++ b/util-linux/mkfs_minix.c
@@ -687,7 +687,7 @@
 
 	xmove_fd(xopen(G.device_name, O_RDWR), dev_fd);
 	if (fstat(dev_fd, &statbuf) < 0)
-		bb_error_msg_and_die("can't stat %s", G.device_name);
+		bb_error_msg_and_die("can't stat '%s'", G.device_name);
 	if (!S_ISBLK(statbuf.st_mode))
 		opt &= ~1; // clear -c (check)
 
diff --git a/util-linux/mount.c b/util-linux/mount.c
index e24fc40..8ec3071 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -1921,7 +1921,7 @@
 	}
 	fstab = setmntent(fstabname, "r");
 	if (!fstab)
-		bb_perror_msg_and_die("can't read %s", fstabname);
+		bb_perror_msg_and_die("can't read '%s'", fstabname);
 
 	// Loop through entries until we find what we're looking for
 	memset(mtpair, 0, sizeof(mtpair));