mke2fs: add support to align hugefiles relative to beginning of the disk

Add the mke2fs.conf configuration option which causes the hugefiles to
be aligned to the beginning of the disk.  This is important if the the
reason for aligning the hugefiles is to support hard-drive specific
features such as Shingled Magnetic Recording (SMR).

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/configure.in b/configure.in
index 3ca5d63..6b09f21 100644
--- a/configure.in
+++ b/configure.in
@@ -1063,6 +1063,7 @@
 	setmntent
 	setresgid
 	setresuid
+	snprintf
 	srandom
 	stpcpy
 	strcasecmp