build system: -fno-builtin-printf

Benefits are: drops reference to out-of-line putchar(), fixes a few cases
of failed string merge.

function                                             old     new   delta
i2cdump_main                                        1488    1502     +14
sha256_process_block64                               423     433     +10
sendmail_main                                       1183    1185      +2
list_table                                          1114    1116      +2
i2cdetect_main                                      1235    1237      +2
fdisk_main                                          2852    2854      +2
builtin_type                                         119     121      +2
unicode_conv_to_printable2                           325     324      -1
scan_recursive                                       380     378      -2
mkfs_minix_main                                     2687    2684      -3
buffer_fill_and_print                                178     169      -9
putchar                                              152       -    -152
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 7/4 up/down: 34/-167)          Total: -133 bytes
   text    data     bss     dec     hex filename
 937788     932   17676  956396   e97ec busybox_old
 937564     932   17676  956172   e970c busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/util-linux/fsck_minix.c b/util-linux/fsck_minix.c
index 33767a1..d2f3524 100644
--- a/util-linux/fsck_minix.c
+++ b/util-linux/fsck_minix.c
@@ -371,9 +371,9 @@
 		}
 	}
 	if (def)
-		printf("y\n");
+		puts("y");
 	else {
-		printf("n\n");
+		puts("n");
 		errors_uncorrected = 1;
 	}
 	return def;
@@ -405,7 +405,7 @@
 		if (isatty(0) && isatty(1))
 			cont = ask("Do you really want to continue", 0);
 		if (!cont) {
-			printf("Check aborted\n");
+			puts("Check aborted");
 			exit(EXIT_SUCCESS);
 		}
 	}
@@ -470,8 +470,8 @@
 	if (!nr)
 		return;
 	if (nr < FIRSTZONE || nr >= ZONES) {
-		printf("Internal error: trying to write bad block\n"
-			   "Write request ignored\n");
+		puts("Internal error: trying to write bad block\n"
+			"Write request ignored");
 		errors_uncorrected = 1;
 		return;
 	}
@@ -659,7 +659,7 @@
 	if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
 		die("can't read inodes");
 	if (NORM_FIRSTZONE != FIRSTZONE) {
-		printf("warning: firstzone!=norm_firstzone\n");
+		puts("warning: firstzone!=norm_firstzone");
 		errors_uncorrected = 1;
 	}
 	get_dirsize();
@@ -713,7 +713,7 @@
 	} else
 		links++;
 	if (!++inode_count[nr]) {
-		printf("Warning: inode count too big\n");
+		puts("Warning: inode count too big");
 		inode_count[nr]--;
 		errors_uncorrected = 1;
 	}
@@ -1299,7 +1299,7 @@
 	}
 	if (changed) {
 		write_tables();
-		printf("FILE SYSTEM HAS BEEN CHANGED\n");
+		puts("FILE SYSTEM HAS BEEN CHANGED");
 		sync();
 	} else if (OPT_repair)
 		write_superblock();