Allow CMake for Android to use ANDROID_NDK_ROOT to deduce the path for
QT_CHAINLOAD_TOOLCHAIN_FILE instead of the user providing it manually.
Change-Id: Ida728011d5ca8d5a723d341ea77b173e8f105f8c
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
And wrap the various behaviors into separate functions.
Change-Id: If940351af34e445de050f2b46301de7080b1555b
Reviewed-by: Cristian Adam <cristian.adam@qt.io>