Small improvements to aria recovery

I spent 4 hours on work and 12 hours of testing to try to find
the reason for aria crashing in recovery when starting a new test,
in which case the 'data directory' should be a copy of "install.db",
but aria_log.00000001 content was not correct.

The following changes are mostly done to make it a bit easier to find out
more in case of future similar crashes:

- Mark last_checkpoint_lsn volatile (safety).
- Write checkpoint message to aria_recovery.trace
- When compling with DBUG and with HAVE_DBUG_TRANSLOG_SRC,
  use checksum's for Aria log pages. We cannot have it on by default
  for DBUG servers yet as there is bugs when changing CRC between
  restarts.
- Added a message to mtr --verbose when copying the data directory.
- Removed extra linefeed in Aria recovery message (cleanup)

mysql-test/mariadb-test-run.pl

@@ -2713,6 +2713,7 @@ ($)
         # Copy datadir from installed system db
         my $path= ($opt_parallel == 1) ? "$opt_vardir" : "$opt_vardir/..";
         my $install_db= "$path/install.db";
+        mtr_verbose("copying $install_db to $datadir");
         copytree($install_db, $datadir) if -d $install_db;
         mtr_error("Failed to copy system db to '$datadir'") unless -d $datadir;
       }

storage/maria/ma_control_file.c

@@ -104,7 +104,7 @@ one should increment the control file version number.
    This LSN serves for the two-checkpoint rule, and also to find the
    checkpoint record when doing a recovery.
 */
-LSN    last_checkpoint_lsn= LSN_IMPOSSIBLE;
+volatile LSN  last_checkpoint_lsn= LSN_IMPOSSIBLE;
 uint32 last_logno=          FILENO_IMPOSSIBLE;
 /**
    The maximum transaction id given to a transaction. It is only updated at

storage/maria/ma_control_file.h

@@ -37,7 +37,7 @@ C_MODE_START
   LSN of the last checkoint
   (if last_checkpoint_lsn == LSN_IMPOSSIBLE then there was never a checkpoint)
 */
-extern LSN last_checkpoint_lsn;
+extern volatile LSN last_checkpoint_lsn;
 /*
   Last log number (if last_logno == FILENO_IMPOSSIBLE then there is no log
   file yet)

storage/maria/ma_loghandler.h

@@ -25,7 +25,11 @@
 /* minimum possible transaction log size */
 #define TRANSLOG_MIN_FILE_SIZE (8*MB)
 /* transaction log default flags (TODO: make it global variable) */
+#ifdef HAVE_DBUG_TRANSLOG_CRC
+#define TRANSLOG_DEFAULT_FLAGS IF_DBUG(TRANSLOG_PAGE_CRC,0)
+#else
 #define TRANSLOG_DEFAULT_FLAGS 0
+#endif
 
 /*
   Transaction log flags.

storage/maria/ma_recovery.c

@@ -133,7 +133,7 @@ static void new_transaction(uint16 sid, TrID long_id, LSN undo_lsn,
 static int new_table(uint16 sid, const char *name, LSN lsn_of_file_id);
 static int new_page(uint32 fileid, pgcache_page_no_t pageid, LSN rec_lsn,
                     struct st_dirty_page *dirty_page);
-static int close_all_tables(void);
+static int close_all_tables(my_bool force_end_newline);
 static my_bool close_one_table(const char *name, TRANSLOG_ADDRESS addr);
 static void print_redo_phase_progress(TRANSLOG_ADDRESS addr);
 static void delete_all_transactions();
@@ -467,7 +467,7 @@ int maria_apply_log(LSN from_lsn, LSN end_redo_lsn, LSN end_undo_lsn,
     we don't use maria_panic() because it would maria_end(), and Recovery does
     not want that (we want to keep some modules initialized for runtime).
   */
-  if (close_all_tables())
+  if (close_all_tables(0))
   {
     ma_message_no_user(0, "closing of tables failed");
     goto err;
@@ -495,6 +495,8 @@ int maria_apply_log(LSN from_lsn, LSN end_redo_lsn, LSN end_undo_lsn,
     /* No dirty pages, all tables are closed, no active transactions, save: */
     if (ma_checkpoint_execute(CHECKPOINT_FULL, FALSE))
       goto err;
+    tprint(tracef, "checkpoint done at " LSN_FMT "\n",
+           LSN_IN_PARTS(last_checkpoint_lsn));
   }
 
   goto end;
@@ -505,7 +507,7 @@ int maria_apply_log(LSN from_lsn, LSN end_redo_lsn, LSN end_undo_lsn,
     delete_all_transactions();
   if (!abort_message_printed)
     error= 1;
-  if (close_all_tables())
+  if (close_all_tables(1))
   {
     ma_message_no_user(0, "closing of tables failed");
   }
@@ -3472,7 +3474,7 @@ static int new_page(uint32 fileid, pgcache_page_no_t pageid, LSN rec_lsn,
 }
 
 
-static int close_all_tables(void)
+static int close_all_tables(my_bool force_end_newline)
 {
   int error= 0;
   uint count= 0;
@@ -3537,7 +3539,7 @@ static int close_all_tables(void)
     }
   }
 end:
-  if (recovery_message_printed == REC_MSG_FLUSH)
+  if (recovery_message_printed == REC_MSG_FLUSH && (force_end_newline || error))
   {
     fputc('\n', stderr);
     fflush(stderr);

storage/maria/ma_recovery_util.c

@@ -87,7 +87,7 @@ void eprint(FILE *trace_file __attribute__ ((unused)),
   if (!trace_file)
     trace_file= stderr;
 
-  if (procent_printed)
+  if (procent_printed && trace_file == stderr)
   {
     procent_printed= 0;
     /* In silent mode, print on another line than the 0% 10% 20% line */