configure.in: fix external libblkid test for static link

External libblkid needs -luuid when linking statically.

Also fix up the bogus other-lib parameter in the libuuid test;
$LIBUUID is the null string, so it doesn't do anything other than
obfuscate the use of AC_CHECK_LIB.

Reported-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/configure b/configure
index a41e008..87fd2f3 100755
--- a/configure
+++ b/configure
@@ -5264,7 +5264,7 @@
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-luuid $LIBUUID $LIBS"
+LIBS="-luuid  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -5476,7 +5476,7 @@
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-lblkid $LIBBLKID $LIBS"
+LIBS="-lblkid -luuid $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */