Make sure the we use QtQuickCompiler only when we either have access
to the sources (internal gerrit repo) or the prebuilt binaries are available.

The internal-build class checks if we are working within The Qt Company network,
so we will also have access to the sources. Setting ENABLE_QTQUICKCOMPILER env
to "1" in local.conf has the same effect. Otherwise check if the prebuilt
binaries are available as installed by the Qt Online SDK.

Change-Id: I63b09ebabc96bb14b119ea7472a3fa7b10e5c2a8
Task-number: QTBUG-53052
Task-number: QTBUG-53216
Reviewed-by: Teemu Holappa <teemu.holappa@theqtcompany.com>

License changed to GPLv3 + Commercial

Change-Id: I267c97216e717ed29071df064337e1bcf83de973
Reviewed-by: Kalle Viironen <kalle.viironen@theqtcompany.com>

Qt Quick Compiler sources codes are not released for customers, so they
cannot build it for themselves. Instead copy qtquickcompiler binary from
the SDK where we have both linux and mingw binaries available.

Change-Id: I697885365d98df394164a15e2517c7c473ac91e5
Reviewed-by: Teemu Holappa <teemu.holappa@theqtcompany.com>

Change-Id: Iabcf736e6f4ae2149b57c84ebdc8b5b1be82023d
Reviewed-by: Teemu Holappa <teemu.holappa@theqtcompany.com>

Change-Id: If6fa08858c0ab19e92c45623f7dcdcf3d8985c1a
Reviewed-by: Teemu Holappa <teemu.holappa@theqtcompany.com>

QtQuickCompiler sources are not distributed, so for BYOS builds
we need to disable. For now, only print note that it's not supported.
Next step is to try to use the precompiled version from SDK.

Change-Id: I8185e66fd2bc6471218ee3ea8520fa40c2c08592
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@theqtcompany.com>

Build Qt Quick Compiler and use it for VKB and QtCharts.
Use BBCLASSEXTEND to build all 3 version (target, native
and nativesdk) of Qt Quick Compiler.

Change-Id: I611fe7762b8d9124b146b7fe976f09130d5912fa
Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com>