BUG#11762667:MYSQLBINLOG IGNORES ERRORS WHILE WRITING OUTPUT

This is a followup patch for the bug enabling the test
i_binlog.binlog_mysqlbinlog_file_write.test
this was disabled in mysql trunk and mysql 5.5 as in the release
build mysqlbinlog was not debug compiled whereas the mysqld was.
Since have_debug.inc script checks only for mysqld to be debug
compiled, the test was not being skipped on release builds.

We resolve this problem by creating a new inc file 
mysqlbinlog_have_debug.inc which checks exclusively for mysqlbinlog
to be debug compiled. if not it skips the test.
 

mysql-test/include/mysqlbinlog_have_debug.inc

+#############################################
+# checks if mysqlbinlog is debug compiled
+# this "cannot" be done simply by using 
+# have_debug.inc 
+#############################################
+
+--disable_query_log
+--let $temp_out_help_file=$MYSQL_TMP_DIR/mysqlbinlog_help.tmp
+--exec $MYSQL_BINLOG --help>$temp_out_help_file
+let log_tmp=$temp_out_help_file;
+--let $temp_inc=$MYSQL_TMP_DIR/temp.inc
+let inc_tmp=$temp_inc;
+
+--perl 
+use strict;
+my $tmp_file= $ENV{'log_tmp'} or die "log_tmp not set";
+open(FILE, "$tmp_file") or die("Unable to open $tmp_file: $!\n");
+my $count = () = grep(/Output debug log/g,<FILE>);
+close FILE;
+
+my $temp_inc= $ENV{'inc_tmp'} or die "temp_inc not set";
+open(FILE_INC,">", "$temp_inc") or die("can't open file \"$temp_inc\": $!");
+print FILE_INC '--let $is_debug= '.$count;
+close FILE_INC;
+EOF
+--source $temp_inc
+
+if (!$is_debug)
+{
+  --skip mysqlbinlog needs to be debug compiled
+}
+--remove_file $temp_out_help_file
+--remove_file $temp_inc
+--enable_query_log