Fixes for make_binary_distribution and mysql_config for OpenSuse 12.1

BUILD/SETUP.sh:
  By default, build also with innodb-plugin
mysql-test/mysql-test-run.pl:
  Also search in lib64 directory for plugins (This is used at least on OpenSuse 12.1 when using default build scripts)
mysql-test/r/lock_multi.result:
  Allow test to be re-run even if it crashed.
mysql-test/t/lock_multi.test:
  Allow test to be re-run even if it crashed.
scripts/make_binary_distribution.sh:
  Ensure that libexecdir is named libexec (was not on OpenSuse 12.1)
scripts/mysql_config.sh:
  Fixed detection of lib64 was used.

mysql-test/mysql-test-run.pl

@@ -2518,7 +2518,8 @@ sub setup_vardir() {
   else
   {
     # hm, what paths work for debs and for rpms ?
-    for (<$bindir/lib/mysql/plugin/*.so>,
+    for (<$bindir/lib64/mysql/plugin/*.so>,
+         <$bindir/lib/mysql/plugin/*.so>,
          <$bindir/lib/plugin/*.dll>)
     {
       my $pname=basename($_);

mysql-test/r/lock_multi.result

@@ -1,4 +1,5 @@
 drop table if exists t1,t2;
+drop DATABASE if exists mysqltest_1;
 create table t1(n int);
 insert into t1 values (1);
 lock tables t1 write;

mysql-test/t/lock_multi.test

@@ -5,6 +5,7 @@
 
 --disable_warnings
 drop table if exists t1,t2;
+drop DATABASE if exists mysqltest_1;
 --enable_warnings
 
 # Test to see if select will get the lock ahead of low priority update