qt5: Upgrade from 5.2.0 to 5.2.1

* qtwayland: Use default LICENSE and LIC_FILES_CHKSUM
  * license texts were added in qtwayland commit 26bdc66fe6c4499332b2ead886a806d09aa07a8a
* qtdeclarative, qtserialport: Update QT_MODULE_BRANCH
  * SHA-1 of v5.2.1 tag is only in release branch

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>