add'l portability fixes

portability fixes / cleanup

Send_field.org_col_name has broken value on secondary execution.
It happens when result field is created from the field which belongs to view
due to forgotten assignment of some Send_field attributes. 
The fix:
set Send_field.org_col_name,org_table_name with correct value during Send_field intialization.

INSTALL PLUGIN and UNINSTALL PLUGIN worked with statement-based and
mixed-mode replication only, but not with row-based replication.

There is no statement-based replication of these statements.
But there was row-based replication of the inserts and deletes
to and from the mysql.plugin table.

The fix is to suppress binlogging during insert and delete to
and from the mysql.plugin table.

We could allocate chunks larger than 4GB, but did our
size-accounting in 32-bit values. This could lead to
spurious warnings, inaccurate accounting, and, in
theory, data loss.
  
Affected: 64-bit platforms. Debug-build (with safemalloc).
At least one buffer larger than 4GB. For potential data
loss, a re-alloc on such a buffer would be necessary.

  - Before sending EOF, check if we've already sent an error.

is used causes server crash.
  Revert the fix : unstable test case revealed by pushbuild

Bug#35161
Fixed memory leak when failing to open a partition.

Bug#20129
Added tests for verifying REPAIR PARTITION.

more clever gcc version checking.

Tilde expansion could fail when it was to expand to an empty string (such as
when HOME is set to an empty string), especially on systems where size_t is
unsigned.

plugin init function fails

Problem: if an INFORMATION_SCHEMA plugin initialization fails
we free some inner plugin's data (schema_table) twice during the 
INSTALL PLUGIN command.

Fix: free it once.

Length value is the length of the field,
Max_length is the length of the field value.
So Max_length can not be more than Length.
The fix: fixed calculation of the Item_empty_string item length

(Patch applied and queued on demand of Trudy/Davi.)

When the fractional part in a multiplication of DECIMALs
overflowed, we truncated the first operand rather than the
longest. Now truncating least significant places instead
for more precise multiplications.

(Queuing at demand of Trudy/Davi.)

Due to unknown changes the test failed in some ways.

Fixed by checking the test case in detail, commenting the expected behavior,
and fixing error directives.

In the course of the analyze unneeded get_lock()/release_lock() use,
unneeded send/reap use, and unneeded sleeps were removed. The lock wait
timeout was reduced to 1 second, so that this is no big-test any more.

The test was split into two parts, one running the tests with
--innodb_locks_unsafe_for_binlog, the other part without.
The main part (include/concurrent.inc) conditionally expects
lock wait timeouts based on the value of the system variable
innodb_locks_unsafe_for_binlog.

The major part of the patch comes from Kristofer Pettersson.

(Chad queues this patch on demand by Trudy/Davi.)

	update accross partitions.
      
It's not Innodb-specific bug.
ha_partition::update_row() didn't set
table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET when
orig_timestamp_type == TIMESTAMP_AUTO_SET_ON_INSERT.

So that a partition sets the timestamp field when a record
is moved to a different partition.

Fixed by doing '= TIMESTAMP_NO_AUTO_SET' unconditionally.
Also ha_partition::write_row() is fixed in same way as now
Field_timestamp::set() is called twice in SET_ON_INSERT case.

(Chad queues this patch on demand by Trudy/Davi.)

Fix for a valgrind warning due to a jump on a uninitialized
variable. The problem was that the sql profile preparation
function wasn't being called for all possible code paths
of query execution.

The solution is to ensure that query profiling is always
started before dispatch_command function is called and to
explicitly call the profile preparation function on bootstrap.