modprobe: emit "can't open 'modules.dep': (errno)" instead of "module not found"

*: s/can't open %s/can't open '%s'/, it's better to use same string.

function                                             old     new   delta
do_modprobe                                          588     601     +13
config_file_action                                   339     345      +6
modprobe_main                                        565     570      +5
unable_to_open                                        14      16      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 26/0)               Total: 26 bytes
   text    data     bss     dec     hex filename
 816800     476    7892  825168   c9750 busybox_old
 816812     476    7892  825180   c975c busybox_unstripped

2 files changed, 2 insertions, 2 deletions

diff --git a/util-linux/fdisk.c b/util-linux/fdisk.c
index b1f0b65c6..dc61e238a 100644
--- a/util-linux/fdisk.c
+++ b/util-linux/fdisk.c
@@ -83,7 +83,7 @@ struct partition {
         unsigned char size4[4];         /* nr of sectors in partition */
 } PACKED;
 
-static const char unable_to_open[] ALIGN1 = "can't open %s";
+static const char unable_to_open[] ALIGN1 = "can't open '%s'";
 static const char unable_to_read[] ALIGN1 = "can't read from %s";
 static const char unable_to_seek[] ALIGN1 = "can't seek on %s";
 
diff --git a/util-linux/umount.c b/util-linux/umount.c
index 0662cea1b..901c9094f 100644
--- a/util-linux/umount.c
+++ b/util-linux/umount.c
@@ -69,7 +69,7 @@ int umount_main(int argc UNUSED_PARAM, char **argv)
         fp = setmntent(bb_path_mtab_file, "r");
         if (!fp) {
                 if (opt & OPT_ALL)
-                        bb_error_msg_and_die("can't open %s", bb_path_mtab_file);
+                        bb_error_msg_and_die("can't open '%s'", bb_path_mtab_file);
         } else {
                 while (getmntent_r(fp, &me, path, PATH_MAX)) {
                         /* Match fstype if passed */