util-linux: take ${sbindir} from the environment if it is set there
fix the test, the [ ] syntax was getting eaten by autoconf

Signed-off-by: Phil Blundell <pb@pbcl.net>
Signed-off-by: Saul Wold <sgw@linux.intel.com
Upstream-Status: Inappropriate [configuration]

Index: util-linux-2.31/configure.ac
===================================================================
--- util-linux-2.31.orig/configure.ac
+++ util-linux-2.31/configure.ac
@@ -89,7 +89,10 @@ AC_SUBST([runstatedir])
 usrbin_execdir='${exec_prefix}/bin'
 AC_SUBST([usrbin_execdir])
 
-usrsbin_execdir='${exec_prefix}/sbin'
+if test -z "$usrsbin_execdir" ;
+then
+   usrsbin_execdir='${exec_prefix}/sbin'
+fi
 AC_SUBST([usrsbin_execdir])
 
 AS_CASE([$libdir],
