Fix libmount build under uClibc

See https://bugs.gentoo.org/show_bug.cgi?id=406303
Patch from http://repository.timesys.com/buildsources/u/util-linux/util-linux-2.21.2/util-linux-2.21.2-sscanf-no-ms-as.patch ported to util-linux-2.22.2

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>

diff -Nura util-linux-2.22.2/configure.ac util-linux-2.22.2-sscanf-no-ms-as/configure.ac
--- util-linux-2.22.2/configure.ac	2012-12-13 08:16:02.973822890 -0300
+++ util-linux-2.22.2-sscanf-no-ms-as/configure.ac	2013-03-07 14:50:39.975512873 -0300
@@ -733,7 +733,6 @@
 UL_BUILD_INIT([libmount])
 UL_REQUIRES_LINUX([libmount])
 UL_REQUIRES_BUILD([libmount], [libblkid])
-UL_REQUIRES_HAVE([libmount], [scanf_alloc_modifier], [scanf string alloc modifier])
 AM_CONDITIONAL(BUILD_LIBMOUNT, test "x$build_libmount" = xyes)
 AM_CONDITIONAL(BUILD_LIBMOUNT_TESTS, test "x$build_libmount" = xyes -a "x$enable_static" = xyes)

diff -Nura util-linux-2.22.2/libmount/src/tab_parse.c util-linux-2.22.2-sscanf-no-ms-as/libmount/src/tab_parse.c
--- util-linux-2.22.2/libmount/src/tab_parse.c	2012-12-12 17:04:47.906355128 -0300
+++ util-linux-2.22.2-sscanf-no-ms-as/libmount/src/tab_parse.c	2013-03-07 15:08:29.589503961 -0300
@@ -58,19 +58,21 @@
  */
 static int mnt_parse_table_line(struct libmnt_fs *fs, char *s)
 {
-	int rc, n = 0, xrc;
-	char *src = NULL, *fstype = NULL, *optstr = NULL;
-
-	rc = sscanf(s,	UL_SCNsA" "	/* (1) source */
-			UL_SCNsA" "	/* (2) target */
-			UL_SCNsA" "	/* (3) FS type */
-			UL_SCNsA" "	/* (4) options */
+	int rc, n = 0, len = strlen (s) + 1, xrc;
+	char *src     = malloc (sizeof *src * len);
+	char *fstype  = malloc (sizeof *fstype * len);
+	char *optstr  = malloc (sizeof *optstr * len);
+
+	rc = sscanf(s,	"%s"" "	/* (1) source */
+			"%s"" "	/* (2) target */
+			"%s"" "	/* (3) FS type */
+			"%s"" "	/* (4) options */
 			"%n",		/* byte count */
 
-			&src,
-			&fs->target,
-			&fstype,
-			&optstr,
+			src,
+			fs->target,
+			fstype,
+			optstr,
 			&n);
	xrc = rc;
 
@@ -132,16 +134,20 @@
  */
 static int mnt_parse_mountinfo_line(struct libmnt_fs *fs, char *s)
 {
-	int rc, end = 0;
+	int rc, end = 0, len = strlen (s) + 1;
 	unsigned int maj, min;
	char *fstype = NULL, *src = NULL, *p;
 
+	fs->root        = malloc (sizeof *fs->root * len);
+	fs->target      = malloc (sizeof *fs->target * len);
+	fs->vfs_optstr  = malloc (sizeof *fs->vfs_optstr * len);
+
 	rc = sscanf(s,	"%u "		/* (1) id */
 			"%u "		/* (2) parent */
 			"%u:%u "	/* (3) maj:min */
-			UL_SCNsA" "	/* (4) mountroot */
-			UL_SCNsA" "	/* (5) target */
-			UL_SCNsA	/* (6) vfs options (fs-independent) */
+			"%s"" "	/* (4) mountroot */
+			"%s"" "	/* (5) target */
+			"%s"	/* (6) vfs options (fs-independent) */
 			"%n",		/* number of read bytes */
 
 			&fs->id,
@@ -163,9 +169,14 @@
 	}
 	s = p + 3;
 
-	rc += sscanf(s,	UL_SCNsA" "	/* (8) FS type */
-			UL_SCNsA" "	/* (9) source */
-			UL_SCNsA,	/* (10) fs options (fs specific) */
+	len           = strlen (s) + 1;
+	fstype        = malloc (sizeof *fstype * len);
+	src           = malloc (sizeof *src * len);
+	fs->fs_optstr = malloc (sizeof *fs->fs_optstr * len);
+
+	rc += sscanf(s,	"%s"" "	/* (8) FS type */
+			"%s"" "	/* (9) source */
+			"%s",	/* (10) fs options (fs specific) */
 
 			&fstype,
 			&src,
@@ -274,11 +285,12 @@
 static int mnt_parse_swaps_line(struct libmnt_fs *fs, char *s)
 {
	uintmax_t fsz, usz;
-	int rc;
-	char *src = NULL;
+	int rc, len = strlen (s) + 1;
+	char *src = malloc (sizeof *src * len);
+	fs->swaptype = malloc (sizeof *fs->swaptype * len);

-	rc = sscanf(s,	UL_SCNsA" "	/* (1) source */
-			UL_SCNsA" "	/* (2) type */
+	rc = sscanf(s,	"%s"		/* (1) source */
+			"%s"		/* (2) type */
			"%jd"		/* (3) size */
			"%jd"		/* (4) used */
			"%d",		/* priority */