Look for and "convert" paths that start with $MYSQL_TMP_DIR

client/mysqltest.c:
  Also look for "$MYSQL_TMP_DIR" when looking for paths to convert
mysql-test/mysql-test-run.pl:
  Export $MYSQL_TMP_DIR
mysql-test/mysql-test-run.sh:
  Export $MYSQL_TMP_DIR

client/mysqltest.c

@@ -3093,8 +3093,10 @@ DYNAMIC_ARRAY patterns;
 static void init_win_path_patterns()
 {
   /* List of string patterns to match in order to find paths */
-  const char* paths[] = { "$MYSQL_TEST_DIR", "./test/", 0 };
-  int num_paths= 2;
+  const char* paths[] = { "$MYSQL_TEST_DIR",
+                          "$MYSQL_TMP_DIR",
+                          "./test/", 0 };
+  int num_paths= 3;
   int i;
   char* p;
 

mysql-test/mysql-test-run.pl

@@ -1117,6 +1117,7 @@ sub environment_setup () {
   $ENV{'USE_RUNNING_SERVER'}= $glob_use_running_server;
   $ENV{'MYSQL_TEST_DIR'}=     $glob_mysql_test_dir;
   $ENV{'MYSQLTEST_VARDIR'}=   $opt_vardir;
+  $ENV{'MYSQL_TMP_DIR'}=      $opt_tmpdir;
   $ENV{'MASTER_MYSOCK'}=      $master->[0]->{'path_mysock'};
   $ENV{'MASTER_MYSOCK1'}=     $master->[1]->{'path_mysock'};
   $ENV{'MASTER_MYPORT'}=      $master->[0]->{'path_myport'};

mysql-test/mysql-test-run.sh

@@ -202,6 +202,7 @@ SYST=0
 REALT=0
 FAST_START=""
 MYSQL_TMP_DIR=$MYSQL_TEST_DIR/var/tmp
+export MYSQL_TMP_DIR
 
 # Use a relative path for where the slave will find the dumps
 # generated by "LOAD DATA" on the master. The path is relative