Make sure all containers compile in strict-iterator mode

Unit-test this by making the QList, QVector, QHash and QMap unit tests
be duplicated under strict-iterator mode. There's no test for
QLinkedList.

The tst_Collections test does not compile under strict-iterator
mode. It generated over 15000 errors when I tried.

The strict iterators required a small change: the difference_type
typedef needs to match the operators that get distances
(operator-(iterator)) and move the iterator around (+, -, +=, -=, etc.).

Task-number: QTBUG-29608
Change-Id: I834873934c51d0f139a994cd395818da4ec997e2
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Jason McDonald <macadder1@gmail.com>
Re-group and re-sort the configure output

G does not come after I. That's actually my fault, in the original
commit. But some options have been added since then in the wrong place
and/or using wrong settings for the report_support function.

Change-Id: Ib3f7d58a41059e5e7f97fd0e223b9629664686ad
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Make QTextDecoder use our qt_from_latin1 code

Disassembly shows the Intel compiler does expand to SIMD, but a much
worse code than ours. Clang 3.4 does generate a compact SIMD version,
probably of the same quality as our hand-written code. And GCC 4.7
through 4.9 don't generate SIMD at all.

So let's use the most efficient version.

Change-Id: I418e201a774ac0df1fb2b7a7d9589df7c9b655db
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Normalize signal & slot signatures in connection

Profiling showed that Qt Creator spent 2% of its load time normalizing
signals and slots. By pre-normalizing everything, we ensure that there
is no runtime cost. Profiling after this commit and the others in this
series shows that the cost dropped down to zero.

Change-Id: Ifc5a2c2552e245fb9a5f31514e9dd683c5c55327
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Fix off-by-one error: the next ASCII character is next one

The bit scan function returns the index of the last non-ASCII
character. The next ASCII is the one after this. This means all the
benchmarks were made while reentering the SIMD loop uselessly...

Change-Id: If7de485a63428bfa36d413049d9239ddda1986aa
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Make D-Bus types without a matching Qt one prettier in qdbus

Print "QMap<QString,QString>" for "a{ss}" and print a nicer expansion of
other types.

Change-Id: I0a7a2ecf8f0a62bd97931f3c129cd4cb4f471ef1
Reviewed-by: Lorn Potter <lorn.potter@jollamobile.com>