Fix xkb.h compile warning on 32 bit systems

The message:

../../../3rdparty/xcb/include/xcb/xkb.h:118:5: error: this decimal
constant is unsigned only in ISO C90 [-Werror]

From the C89 standard:

"The type of an integer constant is the first of the corresponding
list in which its value can be represented. Unsuffixed decimal: int,
long int, unsigned long int;"

In the later standards "unsigned long int" is removed from the "Unsuffixed decimal"
list.

If integer constant is suffixed by the letter u or U, then the list is:
unsigned int, unsigned long int, ..

"unsigned long int" is sufficient on 32 bit systems to store the values of
XCB_XKB_CONTROL_PER_KEY_REPEAT and XCB_XKB_CONTROL_CONTROLS_ENABLED

Task-number: QTBUG-34142
Change-Id: Ic23781fcd00d4901ec9bb5a85068f4315c14bfb8
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
QTimeZone - Change Olsen ID to IANA ID

The name Olson was misspelled as Olsen in the public api of QTimeZone
which is needed to be fixed before first public release in 5.2 would
freeze the api and prevent it being fixed.  It has been decided that
renaming as IANA ID would be more future-proof.

Fixes to the private code will be done separately to keep this patch
against release branch to the minimum required.

Task-number: QTBUG-34735
Change-Id: I8ee90644862c907f6d1937b8536f0c02583ae736
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
QTimeZone - Fix Windows Transitions with null rules

Fix the Windows handling of null DST rules for a given year, if the
calculation rules have a null value then can skip trying to loop through
the calculations until the min/max year is hit which causes the stress
test to time-out in CI, and instead return a value immediately.

Change-Id: Ie2d4ee55c5487e040e0cead91d1be2a0c06d3074
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
QTimeZone - Fix TZ file abbreviations

Fix parsing of TZ file abbreviations, to correctly return cases where
POSIX rule doesn't have separate DST rules, and where abbreviation
is a sub-string of another abbreviation, otherwise any toString() call
will crash.

Add test to exercise all available time zones, especially useful for TZ
file to confirm all file format variations dealt with.  Fix parsing of
Version 3 of TZ file, and ICU display name, to allow all files generated
from release 2013f to pass, otherwise isValid() call will crash.

Task-number: QTBUG-34061
Change-Id: Ie0b6abc218adff1c8967eb33fdb0762041d2305f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
QTimeZone - Fix dateForLocalTime() to check validity of next transition

The private method dateForLocalTime() was not checking that transitions
were valid, resulting in infinite looping when a time zone didn't have
any future transitions.

Change-Id: I0e5d07063861778dd86056a80c36fdd9f9d36133
Reviewed-by: Lars Knoll <lars.knoll@digia.com>