Make configure assume nvi can store backups in /var/tmp.

--- a/dist/configure	2014-09-01 14:46:01.075778095 +0200
+++ b/dist/configure	2014-09-01 14:52:08.411790122 +0200
@@ -21319,23 +21319,8 @@
 if test "${vi_cv_path_preserve+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
-  	dirlist="/var/preserve /var/tmp /usr/tmp"
-	vi_cv_path_preserve=no
-	for i in $dirlist; do
-		if test -d $i/vi.recover; then
-			vi_cv_path_preserve=$i/vi.recover
-			break;
-		fi
-	done
-	if test "$vi_cv_path_preserve" = no; then
-		for i in $dirlist; do
-			if test -d $i -a -w $i; then
-				vi_cv_path_preserve=$i/vi.recover
-				break;
-			fi
-		done
-
-	fi
+#	Assume /var/tmp
+	vi_cv_path_preserve=/var/tmp/vi.recover
 fi
 
 if test "$vi_cv_path_preserve" = no; then

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<tr><td><span title='2015-05-06 18:26:53 +0200'>2015-05-06</span></td><td><a href='/guix/commit/tests/utils.scm?id=d838e7029854d8517c0c5b631f6042a925c86a81'>search-paths: Export 'string-tokenize*'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-05-04 23:30:51 +0200'>2015-05-04</span></td><td><a href='/guix/commit/tests/utils.scm?id=6568d2bd6e4e047dd95b00a7a6e7501a16491eb5'>search-paths: Add 'evaluate-search-paths', from (guix scripts package).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2014-10-05 21:57:19 +0200'>2014-10-05</span></td><td><a href='/guix/commit/tests/utils.scm?id=5e1103821a566e55c848c8fa323d07801cce6ab7'>utils: Add 'strip-keyword-arguments'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2014-07-20 11:36:09 -0500'>2014-07-20</span></td><td><a href='/guix/commit/tests/utils.scm?id=516e3b6f7a57f6b6f378c9174f8c5ffc990df7db'>guix: utils: Add fold-tree and fold-tree-leaves.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2014-04-14 00:24:24 +0200'>2014-04-14</span></td><td><a href='/guix/commit/tests/utils.scm?id=30ce8012cd6265b12f756283633be94a547bf990'>offload: '{send,receive}-files' wait for completion of the transfer.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2014-04-07 18:16:58 +0200'>2014-04-07</span></td><td><a href='/guix/commit/tests/utils.scm?id=68ec0450d1c3f125d7d290958dda6e89b6a0c37e'>tests: Avoid buffering in 'fcntl-flock' tests.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>