Use __aarch64__ instead of __arm64__ to detect AArch64

The latter name was used by Apple in their internal AArch64 LLVM backend,
but has since been merged into LLVM upstream and renamed to AArch64.

https://github.com/llvm-mirror/llvm/commit/29f94c72014eaa5d0d3b920686e68

Change-Id: I319f42f07c95dfbcd121134fbe6e554e2d36453d
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Check the Q_SCRIPTABLE tag of signals and slots as early as possible.

This makes is possible to generate a valid D-Bus XML from a class that has
e.g.  internal slots with pointer parameters by explicitly marking all D-Bus
exports with Q_SCRIPTABLE and running qdbuscpp2xml with the '-a' switch.

Change-Id: Iab32a0a7f46f2516f6385808bbf35b26c7708b1a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
qdoc: Delayed the examples manifest file creation

This avoids the creation of demos-manifest.xml if there
are no demos in the repo.

Change-Id: I4d3bbe4540f4b1532c0d51f62b8d1494864a7b1c
Reviewed-by: Martin Smith <martin.smith@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>