Fix remaining 5.2 buildbot problems:

- Cherrypick MBUG#688404  (PBXT crashes in debug/x64)
- Fix unixism (rm -rf) in the test suite_timeout
- Avoid plugin tests on Windows/embedded, plugins do not and will not work here

mysql-test/include/have_example_plugin.inc

@@ -3,7 +3,7 @@
 # i.e it will support dlopen
 #
 --source include/have_dynamic_loading.inc
-
+--source include/not_windows_embedded.inc
 #
 # Check if the variable HA_EXAMPLE_SO is set
 #

mysql-test/mysql-test-run.pl

@@ -320,9 +320,10 @@ sub main {
     gcov_prepare($basedir . "/" . $opt_gcov_src_dir);
   }
 
+  
   if (!$opt_suites) {
     $opt_suites= $DEFAULT_SUITES;
-
+	
     # Check for any extra suites to enable based on the path name
     my %extra_suites=
       (
@@ -2376,7 +2377,7 @@ sub setup_vardir() {
     $plugindir="$opt_vardir/plugins";
     unshift (@opt_extra_mysqld_opt, "--plugin-dir=$plugindir");
     mkpath($plugindir);
-    if (IS_WINDOWS)
+    if (IS_WINDOWS && !$opt_embedded_server)
     {
       for (<../storage/*$opt_vs_config/*.dll>,
            <../plugin/*$opt_vs_config/*.dll>,

mysql-test/suite/parts/inc/partition_check_drop.inc

@@ -66,10 +66,10 @@ if ($found_garbage)
    }
    # Do a manual cleanup, because the following tests should not suffer from
    # remaining files
-   --exec rm -f $MYSQLD_DATADIR/test/t1* || true
+   --exec perl -e "unlink(<$MYSQLD_DATADIR/test/t1*>)"
    if ($with_directories)
    {
-	   --exec rm -f $MYSQLTEST_VARDIR/tmp/t1* || true
+	   --exec perl -e "unlink(<$MYSQLD_DATADIR/test/tmp/t1*>)"
    }
 }
 --enable_query_log

storage/pbxt/src/memory_xt.h

@@ -29,8 +29,21 @@
 
 struct XTThread;
 
-#ifdef DEBUG
-#define DEBUG_MEMORY
+#if (defined DEBUG)
+/*
+	Disable PBXT debug malloc on Windows, as it is not properly aligned.
+	malloc() alignment requiremebt on x64 is documented as 16 bytes. PBXT debug
+	malloc is only 8 bytes aligned. Improper alignment will lead to a crash if
+	e.g SSE instructions access heap memory.
+
+	This might be general problem , however crashes were seen so far only
+	on Windows (crash during setjmp() on memory allocated with pbxt debug malloc).
+	
+	Besides, on Windows there is already a debug malloc by C runtime.
+*/
+#ifndef _WIN32
+	#define DEBUG_MEMORY
+#endif
 #endif
 
 #ifdef DEBUG_MEMORY