Fix for Bug#53925 (valgrind failures in rpl.rpl_get_master_version_and_clock

in mysql-trunk-merge).

There were two problems:
  - a mistake during merge of a patch for Bug 52629 from 5.1;
  - MTR treated auxilary output of newer valgrind as an error.

The fixes are:
  - Fix merge error;
  - Teach MTR to skip 'HEAP summary' section of valgrind output.

dbug/dbug.c

@@ -507,13 +507,7 @@ int DbugParse(CODE_STATE *cs, const char *control)
   rel= control[0] == '+' || control[0] == '-';
   if ((!rel || (!stack->out_file && !stack->next)))
   {
-    /*
-      We need to free what's already in init_settings, because unlike
-      the thread related stack frames there's a chance that something
-      is in these variables already.
-    */
-    if (stack == &init_settings)
-      FreeState(cs, stack, 0);
+    FreeState(cs, stack, 0);
     stack->flags= 0;
     stack->delay= 0;
     stack->maxdepth= 0;

mysql-test/mysql-test-run.pl

@@ -3811,6 +3811,7 @@ sub extract_warning_lines ($$) {
       # Skip valgrind summary from tests where server has been restarted
       # Should this contain memory leaks, the final report will find it
       $skip_valgrind= 1 if $line =~ /^==\d+== ERROR SUMMARY:/;
+      $skip_valgrind= 1 if $line =~ /^==\d+== HEAP SUMMARY:/;
       $skip_valgrind= 0 unless $line =~ /^==\d+==/;
       next if $skip_valgrind;
     }