mysql-test-run fixes:

libexec support in install_test_db
--start-from in mysql-test-run


mysql-test/install_test_db.sh:
  libexec support in install_test_db
mysql-test/mysql-test-run.sh:
  --start-from in mysql-test-run

mysql-test/install_test_db.sh

@@ -12,11 +12,13 @@ if [ x$1 = x"-bin" ]; then
  BINARY_DIST=1
  fix_bin=mysql-test
  scriptdir=../bin
+ libexecdir=../libexec
 else
  execdir=../sql
  bindir=../client
  fix_bin=.
  scriptdir=../scripts
+ libexecdir=../libexec
 fi
 
 vardir=var
@@ -36,8 +38,13 @@ EXTRA_ARG=""
 
 if test ! -x $execdir/mysqld
 then
-  echo "mysqld is missing - looked in $execdir"
-  exit 1
+  if test ! -x $libexecdir/mysqld
+  then
+    echo "mysqld is missing - looked in $execdir and in $libexecdir"
+    exit 1
+  else
+    execdir=$libexecdir
+  fi
 fi
 
 # On IRIX hostname is in /usr/bsd so add this to the path

mysql-test/mysql-test-run.sh

@@ -229,6 +229,7 @@ while test $# -gt 0; do
     --local)   USE_RUNNING_SERVER="" ;;
     --extern)  USE_RUNNING_SERVER="1" ;;
     --tmpdir=*) MYSQL_TMP_DIR=`$ECHO "$1" | $SED -e "s;--tmpdir=;;"` ;;
+    --start-from=*) START_FROM=`$ECHO "$1" | $SED -e "s;--start-from=;;"` ;;
     --local-master)
       MASTER_MYPORT=3306;
       EXTRA_MYSQL_TEST_OPT="$EXTRA_MYSQL_TEST_OPT --host=127.0.0.1 \
@@ -1185,6 +1186,11 @@ run_testcase ()
    fi
   fi
 
+ if [ "$tname" '<' "$START_FROM" ] ; then
+#   skip_test $tname;
+   return;
+ fi
+
  if [ -n "$DO_TEST" ] ; then
    DO_THIS_TEST=`$EXPR \( $tname : "$DO_TEST" \) != 0`
    if [ x$DO_THIS_TEST = x0 ] ;