You can put assignPropertiesToORM() method to your aspect class and modify rows 82-89.

PropertyIntroductionAspect.php

<?php
namespace ..........

use TYPO3\Flow\Annotations as Flow;
use Doctrine\ORM\Mapping as ORM;

/**
 * 
 * @Flow\Scope("singleton")
 * @Flow\Aspect
 */
class SomeAspect {

        /**
	 * @Flow\Inject
	 * @var \TYPO3\Flow\Reflection\ReflectionService
	 */
	protected $reflectionService;

	/**
	 * @param \TYPO3\Flow\Reflection\ReflectionService $reflectionService Description
	 */
	public function injectReflectionService(\TYPO3\Flow\Reflection\ReflectionService $reflectionService) {
		$this->reflectionService = $reflectionService;
	}
  
	/**
	 * @var string
	 * @Flow\Introduce("some Pointcut")
	 */
	protected $purpose;

	/**
	 * @var string
	 * @Flow\Introduce("some other Pointcut")
	 */
	protected $somethingElse;

	/**
	 * Dirty hack for reflection service by introduced properties -> introduced properties are not in persistence layer
	 * 
	 * @todo : Remove this advice if http://forge.typo3.org/issues/27045 is resolved.
	 * 
	 * @param \TYPO3\Flow\Aop\JoinPointInterface $joinPoint The current join point
	 * @return void
	 * @Flow\Before("method(TYPO3\Flow\Persistence\Doctrine\EntityManagerFactory->create())")
	 */
	public function assignPropertiesToORM(\TYPO3\Flow\Aop\JoinPointInterface $joinPoint) {
			// those are added as property even if not tagged with entity/valueobject
		$propertyTypeWhiteList = array(
			'DateTime',
			'SplObjectStorage',
			'Doctrine\Common\Collections\Collection',
			'Doctrine\Common\Collections\ArrayCollection'
		);

		$aspectClassName = get_class($this);
		$aspectClassShema = $this->reflectionService->getClassSchema($aspectClassName);

		$introducedPropertyNames = $this->reflectionService->getPropertyNamesByAnnotation($aspectClassName, 'TYPO3\Flow\Annotations\Introduce');

		foreach ($introducedPropertyNames as $propertyName) {
			$isTransientProperty = $this->reflectionService->isPropertyAnnotatedWith($aspectClassName, $propertyName, 'TYPO3\Flow\Annotations\Transient');
			if ($isTransientProperty) {continue;}

			$declaredType = trim(implode(' ', $this->reflectionService->getPropertyTagValues($aspectClassName, $propertyName, 'var')), ' \\');
			if (preg_match('/\s/', $declaredType) === 1 || empty($declaredType)) {
				throw new \TYPO3\Flow\Reflection\Exception\InvalidPropertyTypeException(sprintf('Introduced in "%s" property "%s" has no @var annotation or type is not defined or is not annotated as "TYPO3\Flow\Annotations\Transient". Please define type for "%s" or annotate it as "TYPO3\Flow\Annotations\Transient".', $aspectClassName, $propertyName, $propertyName), 1366547612);
			}

			try {
				$parsedType = \TYPO3\Flow\Utility\TypeHandling::parseType($declaredType);
			} catch (\TYPO3\Flow\Utility\Exception\InvalidTypeException $exception) {
				throw new \InvalidArgumentException(sprintf($exception->getMessage(), 'class "' . $aspectClassName . '" for property "' . $propertyName . '"'), 1366551857);
			}
			if (!in_array($parsedType['type'], $propertyTypeWhiteList)
			&& (class_exists($parsedType['type']) || interface_exists($parsedType['type']))
			&& !($this->reflectionService->isClassAnnotatedWith($parsedType['type'], 'TYPO3\Flow\Annotations\Entity') || $this->isClassAnnotatedWith($parsedType['type'], 'Doctrine\ORM\Mapping\Entity') || $this->isClassAnnotatedWith($parsedType['type'], 'TYPO3\Flow\Annotations\ValueObject'))) {
				continue;
			}

			// get all affected classes stuff is still not present but if it is possible here then you can add this Property to all affected classes
//			foreach ($affectedClasses as $affectedClass){
//				$classSchema = $this->reflectionService->getClassSchema($affectedClass);
//				$classSchema->addProperty($propertyName, $declaredType, $this->isPropertyAnnotatedWith($aspectClassName, $propertyName, 'TYPO3\Flow\Annotations\Lazy'));
//				if ($this->reflectionService->isPropertyAnnotatedWith($className, $propertyName, 'TYPO3\Flow\Annotations\Identity')) {
//				    $classSchema->markAsIdentityProperty($propertyName);
//				}
//			}

		}
	}
}