e2fsprogs: fix configure help text for quota

It's --enable-quota, not --enable-libquota.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/configure b/configure
index d69695f..01b56c5 100755
--- a/configure
+++ b/configure
@@ -1495,7 +1495,7 @@
   --disable-testio-debug  disable the use of the test I/O manager for debugging
   --disable-libuuid	  do not build private uuid library
   --disable-libblkid	  do not build private blkid library
-  --enable-libquota	  enable quota support
+  --enable-quota	  enable quota support
   --disable-debugfs   	  disable support of debugfs program
   --disable-imager   	  disable support of e2image program
   --disable-resizer   	  disable support of e2resize program